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    Ask Me Anything | April 2023

    enApril 03, 2023
    What advantages does Indeed offer for hiring candidates?
    How does Rocket Money help with personal finances?
    What benefits does FedEx provide for businesses?
    How does city size affect political structure and options?
    What factors influence the future of social media platforms?

    Podcast Summary

    • Maximize your hiring efforts with Indeed and save money using Rocket MoneyLeverage Indeed for efficient hiring and save an average of $720 yearly by canceling unwanted subscriptions with Rocket Money

      For hiring needs, instead of actively searching for candidates, utilize platforms like Indeed. With over 350 million monthly visitors and a matching engine, Indeed helps you find quality candidates efficiently. Employers agree that Indeed delivers the highest quality matches compared to other job sites. Additionally, listeners of this podcast can receive a $75 sponsored job credit by visiting indeed.com/mindscape. Another takeaway is the importance of managing personal finances effectively. Many of us underestimate the impact of subscriptions on our budgets. Rocket Money, a personal finance app, assists in identifying and canceling unwanted subscriptions, monitoring spending, and helping lower bills. Rocket Money has saved its members an average of $720 a year with over 500 million canceled subscriptions. Lastly, the power of utilizing services like FedEx for businesses was highlighted. FedEx offers fast delivery, simple returns, weekend home delivery, and picture proof of delivery to ensure package security and visibility. With these benefits, it's no wonder that 98% of the US population has access to FedEx's services on Saturday and 50% on Sunday.

    • Impact of algorithms on podcast reach and engagementYouTube's recommendation algorithm can lead to unpredictable audience reach, potentially attracting listeners with opposing views and negatively impacting engagement.

      Podcast listening behaviors and algorithms significantly impact audience reach and engagement. The speaker shared his experience with a stable podcast audience on traditional podcast platforms versus the unpredictable reach on YouTube. An unexpected surge in listeners occurred due to YouTube's recommendation algorithm, which led to an audience that was against the podcast's topic, resulting in negative reviews. The speaker suspects that YouTube's algorithm may analyze audio content to generate recommendations, potentially misinterpreting the podcast's topic as climate change-related. This incident highlights the importance of understanding audience demographics and the power of algorithmic recommendations in shaping public discourse. It also underscores the importance of maintaining a diverse and inclusive information ecosystem.

    • Skepticism towards unconventional theories in cosmologyWhile a paper suggesting black holes as the source of dark energy is intriguing, it contradicts conventional cosmology and requires further investigation to be considered valid.

      While scientists approach their research with sincerity and belief in their findings, not all theories are created equal. During a recent AMA session, a listener questioned the validity of a paper suggesting black holes could be the source of dark energy due to its contradiction with conventional cosmology. The speaker acknowledged the authors' good faith and the paper's publication, but expressed skepticism, stating that more evidence is needed to convince him of its validity. He explained that the authors' calculations suggest black holes' mass increases at a rate consistent with the universe's expansion, which could imply black holes are the dark energy. However, the conventional view holds that black holes' energy density decreases as the universe expands, and the total energy remains constant. The speaker emphasized that the authors' claim is intriguing but requires further investigation to be considered a viable theory. He concluded by acknowledging the potential for being wrong and encouraging continued scientific exploration.

    • Expert Skeptical of Black Hole Mass Gain ClaimAn expert in general relativity expresses skepticism towards a claim that black holes gain mass due to the expansion of the universe, emphasizing the importance of evidence, understanding, and expertise in evaluating scientific claims.

      The speaker, who is an expert in general relativity, expresses skepticism towards a scientific paper claiming that black holes gain mass due to the expansion of the universe. The speaker's skepticism is based on his deep understanding of general relativity and the unreasonableness of the claimed implications, such as galaxies being much heavier than observed. He also emphasizes the importance of having expectations and updating them based on evidence, while acknowledging the possibility of being wrong. The speaker also cautions against the trend of doing one's own research without proper expertise and understanding of the field. In essence, the speaker values the importance of evidence, understanding, and expertise in evaluating scientific claims.

    • Addressing skepticism in unconventional findingsAcknowledging potential skepticism and addressing counterarguments in unconventional scientific findings builds credibility and encourages deeper understanding, while failing to do so can lead to dismissal or misunderstanding.

      When presenting unconventional scientific findings, it's crucial for authors to acknowledge potential skepticism and address counterarguments. This approach builds credibility and encourages a deeper understanding of the research. The absence of such acknowledgement can lead to dismissal or misunderstanding, even if the findings are significant. Two examples given were a paper on energy non-conservation in quantum measurement and the controversial book "The Bell Curve." In both cases, the lack of a clear explanation as to why the authors' findings diverged from widely held beliefs left room for skepticism and misinterpretation. Effective communication in science requires not only presenting results but also justifying their validity and significance.

    • Evaluating scientific research goes beyond reading the paperSkepticism is crucial in scientific inquiry, questioning results and considering researchers' motivations and credibility. Brute facts in physics and cosmology should be our focus, and patience and perseverance are essential in scientific research.

      Evaluating the validity of scientific research goes beyond just reading the paper and accepting the results. It involves considering the credibility of the researchers, their motivations, and the reasoning behind their conclusions. The speaker emphasized that skepticism is crucial in scientific inquiry and that it's essential to question results that seem too good to be true or challenge our existing understanding. Another intriguing idea discussed was the possibility of us living in a simulation, and how it might impact our ability to explain phenomena like dark matter and dark energy. While the speaker acknowledged that it's conceivable that we live in a simulated reality, they found the notion that simulators would intentionally confuse us to be implausible. They also questioned the significance of the lack of resolution in scientific mysteries as evidence for the simulation hypothesis. The speaker emphasized that there are still brute facts in physics and cosmology that we may never fully explain, and they expressed their belief that the scientific process should be focused on understanding these facts rather than speculating about the nature of reality. They also encouraged patience and perseverance in scientific research, as there may be answers to even the most challenging questions yet to be discovered.

    • Evidence for Dark Matter from Cosmic Microwave BackgroundThe cosmic microwave background's power spectrum provides strong evidence for the existence of dark matter, which is a gravitational pull from something other than ordinary matter.

      The evidence for the existence of dark matter in the universe is strong, as indicated by the cosmic microwave background and its power spectrum. Dark matter is a gravitational pull sourced from something other than ordinary matter, and its presence is evidenced by the differences in the power spectrum of the cosmic microwave background for odd and even numbered peaks. Modified gravity theories, such as MOND, propose changing the way gravity works instead of introducing a new particle as dark matter. While these theories are intriguing, the data from the cosmic microwave background strongly supports the existence of dark matter. Babbel, a language learning app, can help travelers like the speaker connect with locals and navigate conversations, making language learning an essential tool for exploration. For a limited time, Mindscape listeners can get up to 60% off their Babbel subscription by visiting atbabbel.com/mindscape.

    • The nature of gravity and dark matterOngoing debate in physics: Modified gravity theories vs. search for new dark matter particles. Austen's novels: Character development and societal commentary beyond plot.

      The ongoing debate in physics regarding the nature of gravity and the existence of dark matter involves both modified gravity theories and the search for new particles. While some argue that gravity is modified and new fields explain the cosmic microwave background data, others believe there is compelling evidence for the existence of dark matter, which remains elusive in experiments. Jane Austen's genius lies in her mastery of character development and her ability to explore societal norms, but her novels may not be as captivating for the plot alone. Instead, readers are drawn to the layers of emotion, social commentary, and wit that Austen infuses into her stories.

    • Exploring the depth of Austen's novelsJane Austen's novels offer more than romance, with intricate character analysis, societal commentary, and hidden meanings to discover

      That Jane Austen's novels offer more than just enjoyable romantic stories. While her novels are renowned for their intricate character analysis and delightful romantic journeys, what truly sets Austen apart as a genius is her use of subtle subtext and nuanced commentary on societal norms and expectations. Austen invites readers to delve deeper into her works, rewarding those who put in the effort to decipher her hidden meanings. For instance, her famous opening line in "Pride and Prejudice" is not meant to be taken at face value, and many of her characters, such as Mr. Bennett, are not as they seem on the surface. By challenging readers to look beyond the surface, Austen invites us to consider the complex realities of life, even as she offers us the pleasures of a well-crafted romantic tale.

    • Exploring human connections in Austen's novels and debating ideal city sizeJane Austen's novels endure due to their human exploration, Bohr's impact on quantum mechanics came from charisma and community admiration, and ideal city size is a matter of personal preference

      Jane Austen's novels, despite focusing on a narrow slice of the world, continue to captivate readers due to their meaningful connections and exploration of human relationships. Regarding the influence of Niels Bohr on quantum mechanics, despite his philosophical writings being difficult to understand and subject to multiple interpretations, his charisma and the admiration of the scientific community played a significant role in his impact. In the realm of city living, there is ongoing debate about the ideal city size, with some favoring larger cities with extensive facilities and others preferring smaller ones for ease of navigation. Ultimately, the ideal city size may depend on individual preferences and circumstances. In summary, Austen's novels' enduring appeal lies in their exploration of human connections, Bohr's influence on quantum mechanics stemmed from his charisma and the community's desire for clarity, and the ideal city size remains a matter of personal preference.

    • The size of a city or society influences its political structureLarger societies offer more choices but require complex governance, while smaller societies are simpler to navigate and govern but offer fewer options

      The size of a city or society influences the availability of options and the complexity of its political structure. A larger city or society, like one with 20 million people, offers more choices for dining and other activities due to its larger population and capacity. However, it also requires more intricate political structures to aggregate individual preferences into societal decisions. The political process in larger societies is more complex, leading to the existence of multiple political parties. On the other hand, smaller societies, like a half million-person city, offer less variety but are easier to navigate and govern. The choice between a large, complex society and a smaller, simpler one depends on individual needs and desires. Additionally, larger cities have economies of scale, allowing for the occurrence of phenomena that cannot happen in smaller ones. In summary, the size and complexity of a society or city impact the availability of options and the political structure, with larger entities offering more choices but requiring more intricate governance systems.

    • Impact of Government Structure on Smaller Political PartiesPresidential systems make it hard for smaller parties to influence, while parliamentary systems allow coalitions for potential power.

      The structure of a government, specifically whether it follows a presidential or parliamentary system, significantly impacts the power dynamic between smaller political parties. In a presidential system, the focus is on the direct election of the president, making it challenging for smaller parties to wield significant influence. In contrast, parliamentary systems allow for coalitions between parties, giving smaller parties the potential for substantial power due to their ability to influence which party forms the government. Furthermore, the discussion touched upon the philosophical thought experiment of Mary the Color Scientist, which explores the distinction between physical knowledge and subjective experiences. The question was raised as to whether there might be a connection between this thought experiment and the capabilities of large language models. However, it was concluded that while both involve the acquisition of knowledge, the experiences of a conscious being and a language model are fundamentally different. In summary, the conversation highlighted the importance of understanding the structural differences between political systems and the implications for smaller parties, as well as the philosophical distinctions between physical knowledge and subjective experiences.

    • Understanding emergent behaviors in large language modelsStudying large language models could reveal insights into emergent phenomena and the differences between learning facts and sensory experiences

      The field of studying large language models and their learning processes is an exciting frontier, offering potential insights into the differences between learning facts and experiencing sensory information. This is particularly intriguing as we cannot directly experiment on human brains to observe neuronal changes, but we can with large language models. Emergence, a concept often discussed in various scientific circles, is an example of how complex behaviors can arise from simpler components. Tables and chairs are a classic example of emergent phenomena, where a comprehensive description involves quantum field theory, but a less comprehensive description is sufficient for everyday understanding. While some may restrict the definition of emergence to only those phenomena where we don't understand the underlying mechanisms, it's more productive to focus on understanding the cases we do understand first and expanding our knowledge gradually. The study of large language models could provide valuable insights into emergent behaviors and the differences between learning facts and experiencing sensory information.

    • Singularities in Classical General RelativitySingularities may form in classical general relativity, but real-world black holes may have different structures due to quantum mechanics and ongoing research aims to understand these complexities. Roy Kerr challenges the singularity theorem's assumptions.

      While the mathematical solutions for black holes, including the Kerr solution, often assume a vacuum and do not fully treat matter quantum mechanically, the singularity theorems in classical general relativity still suggest that singularities will form under certain conditions. However, real-world black holes created from collapsing matter may have vastly different internal structures than the toy model solutions, and ongoing research through numerical simulations aims to better understand these complexities. Roy Kerr's challenge to Penrose's singularity theorem lies in the assumptions behind classical general relativity and its lack of quantum mechanics, implying that singularities may not exist in the real world but rather indicate the breakdown of the theory at a certain scale.

    • Philosophical Perspectives on MathematicsLogical realism posits that mathematical theorems are reliable and objective conclusions derived from axioms, while acknowledging they may not reflect an independently existing truth.

      There are different philosophical perspectives on the nature of mathematics and its relationship to reality. While some argue for mathematical realism, which is the belief that mathematical structures and theorems have an independent existence, others propose a more conditional view, such as logical realism. Logical realism suggests that theorems are reliable and objective conclusions derived from axioms, and while they may not reflect an independently existing truth, they still have value in describing the physical world. The distinction between realism and objectivity is important, as the former implies a deeper understanding of existence beyond agreement on the truth of statements. The debate around these ideas is complex and ongoing, with various philosophers proposing different viewpoints and models.

    • Philosophical debate on reality and mathematicsSome philosophers believe mathematics describes real entities, others see it as useful concepts. Debate continues on the nature of reality and the role of mathematics in physics.

      There is ongoing debate among philosophers and mathematicians about the nature of reality and the role of mathematics in describing it. Some argue for realism, believing that mathematical structures and concepts correspond to real entities or properties in the physical world. Others, like the speaker, lean towards nominalism, viewing mathematical structures as useful names or concepts rather than real entities. The speaker also expressed uncertainty about the significance of debating what is real and what is not, focusing instead on the important properties and deductions that can be derived from mathematical axioms. In the context of the past hypothesis in physics, there is disagreement about how to best describe the early universe, with some emphasizing the importance of specific microstates and others focusing on the absence of conspiratorial correlations. Ultimately, the speaker acknowledged the importance of these questions but expressed uncertainty about the best way to approach them.

    • Physicists debate early universe's low entropy statePhysicists argue over the significance of the early universe's low entropy and whether it's typical or unusual, while considering the role of quantum mechanics and the focus on initial conditions vs future evolution.

      Physicists debate whether the early universe's low entropy state is unusual, or if it's just one of many possible microstates with typical statistics. They also discuss the relevance of this debate in the context of quantum mechanics. In the discussion, it was pointed out that the early universe's low entropy is a significant fact, but the lack of unusual correlations is expected. The debate revolves around whether to focus on the initial conditions or the future evolution of the universe to understand its properties. However, it was suggested that this classical conversation may become irrelevant once quantum mechanics is taken into consideration. Furthermore, the idea of emergence was raised in relation to human civilization and AI, with the conclusion that human civilization may not have emergent goals and motivations that don't exist at the individual level.

    • Understanding the complexities of AI and its relationship with physicsExploring AI systems like ChatGPT and DALL E can help us appreciate their limitations and the role of physics in their optimization and efficiency

      While it can be useful to attribute intentions or goals to human civilization and new technologies like AI programs, it's important to remember that these are simplifications. Human civilization and AI systems function in complex ways that may not align with a single, unified goal. Daniel Dennett's concept of the "intentional stance" highlights the challenge of determining when to talk about systems as having intentions. Regarding the relationship between machine learning and physics, the use of diffusion models in image generation is an interesting connection. In the past, AI programs attempted to model the world explicitly (symbolic approach), but the more recent connectionist approach lets the program learn from data and adjust accordingly. However, there are limitations to this approach, and thermodynamic or statistical mechanical considerations come into play. For instance, AI programs like ChatGPT explore a vast space of possible answers, and their responses can vary. Understanding the physics behind these models can help optimize their learning process and make them more efficient. Playing around with AI programs like ChatGPT and DALL E is an excellent way to explore their capabilities and better understand their limitations. While these systems are not conscious, they can learn and generate impressive results. As AI continues to evolve, it's crucial to recognize their complexities and the role of physics in their development.

    • Understanding the structure of the vast space of possible answers in AI and MLThe physics of AI and ML aims to navigate the vast space of possible answers efficiently while acknowledging irreversible information loss in certain processes

      The field of artificial intelligence and machine learning presents a vast space of possible answers, and researchers are working on finding efficient ways to navigate this space by attributing structure to it. This is known as the physics of machine learning and artificial intelligence. The loss of information due to entropy is a result of coarse graining, not a fundamental law of physics. At a fine-grained level, the world is information-preserving and reversible. However, the measurement process in quantum mechanics involves an irreversible loss of information. When discussing black holes and Hawking radiation, it's important to remember that the total evolution of the universe should be information-conserving, but individual branches of the wave function can exhibit irreversible information loss due to measurement and decoherence. In essence, the study of the physics of machine learning and artificial intelligence involves understanding the structure of the vast space of possible answers and navigating it efficiently, while acknowledging the complexities and subtleties of quantum mechanics and information loss in certain processes.

    • Exploring unitary information conserving evolution of black holes and retrocausality might not be necessary based on current quantum mechanics knowledge.While thought experiments are valuable for studying complex systems, delving into retrocausality and transactional interpretation for black hole evolution may not be necessary based on current quantum mechanics knowledge.

      While unitary information conserving evolution of black holes is an intriguing topic, it may not be worth delving too deeply into retrocausality and the transactional interpretation, as it is not necessary based on current knowledge in quantum mechanics. Thought experiments remain an essential tool in physics, especially when studying complex systems, even if their role may not be as obvious as in more established fields like quantum mechanics or relativity. And finally, while personal opinions may differ on the Academy Awards and their nominations, it's important to remember that everyone's list of favorite movies may vary, and the awards do not necessarily reflect the definitive best films of the year.

    • Exploring artistry and physics in 'The Menu' and relativityAppreciating 'The Menu's' deeper themes and understanding simultaneity in physics through relativity's reference frames

      The discussion revolved around the appreciation for deep and complex themes in art, specifically in the movie "The Menu," and the concept of simultaneity in the context of space and time in physics. Regarding "The Menu," the speakers expressed their admiration for the film, which goes beyond a mere satire of foodie culture. Instead, they saw it as an interrogation of artistry, creativity, and the relationship between artists and their audiences. On the other hand, the physics part of the conversation focused on the concept of simultaneity, with one listener seeking clarification on the relationship between Proxima Centauri's distance from Earth and the idea of simultaneous events. The speakers explained that, according to relativity, one can pick reference frames that are not tilted more than 45 degrees to understand this concept, leading to a simple calculation of 8 years. Lastly, there was a brief mention of the ongoing debate between quantum mechanics and Penrose's controversial idea about gravity causing wave function collapses, and the possibility of an emergent space-time leading to a reevaluation of locality and Bell's theorem.

    • Emergent Locality and Time DilationIn theories where space and time are emergent, locality might not be a fundamental concept and time dilation is a result of the combined effects of special and general relativity, causing clocks on different trajectories to run at different rates.

      In theories where space and time are emergent, locality may not be a fundamental concept but rather an approximation, similar to temperature and density in everyday objects. This perspective could lead to minor variations in theories like Bell's theorem, but the theorem itself is not expected to change significantly. The surprise people feel when encountering Bell's theorem, which reveals the non-classical nature of the world, is not a major concern for those who accept the Everettian view of reality. Instead, the mystery lies in why the world exhibits any locality at all, given that it's not a fundamental aspect of reality according to this perspective. Another topic discussed was time dilation in relativity. The idea that a clock on the International Space Station runs slower than one on Earth is due to the combined effects of special and general relativity. The clocks are not in equivalent trajectories, and comparing their readings requires a protocol for synchronization. The difference in readings is a result of the clocks being in different gravitational fields and moving at different velocities relative to each other. In summary, the key takeaways are that locality might not be a fundamental concept in theories where space and time are emergent, and time dilation is a result of the combined effects of special and general relativity. The clocks on different trajectories appear to run at different rates due to their different velocities and gravitational environments.

    • The effects of gravity and motion on timeIn special relativity, time can vary depending on factors like gravity and motion. Calculations are made using similar equations to those for spatial distances.

      In the realm of special relativity, just as different spatial trajectories can result in varying distances despite starting and ending at the same points, different temporal trajectories can also result in different elapsed times. This is due to factors like gravity and motion, and can be calculated using equations similar to those used for spatial distances. In the world of social media, the future remains uncertain, with various competitors and trends emerging. Decentralized networks like Blue Sky offer potential for greater individual control over data, but the success of any social media platform ultimately depends on user adoption and the ability to monetize the platform. Twitter, despite its current challenges, may still hold a strong position due to its large user base. Ultimately, the future of social media is uncertain and will depend on various factors including user preferences, technological advancements, and business models.

    • Causation: An Emergent PhenomenonCausation is a human concept, not a fundamental property of the universe. Urbanization can benefit nature when populations live densely and preserve habitats.

      The concept of causation is an emergent phenomenon, not a fundamental property of the universe. According to the discussion, causation is a way humans conceptualize events based on physical laws, and it doesn't have a separate term in fundamental physics equations. Einstein's field equations for the universe already include the cosmological constant as a form of energy, and there's no need to add it later. Joe Walston's perspective on urbanization suggests that a growing urban population can be beneficial for nature if we live densely and preserve habitats. These ideas, among others discussed in the podcast, challenge conventional ways of thinking and highlight the importance of considering higher-level emergent phenomena. While it's essential to appreciate individual podcast episodes, some, like Joe Walston's discussion on urbanization, have made a significant impact on the speaker's perspective.

    • Entropy, Arrow of Time, and Disruptiveness in Science and TechnologyEntropy shapes causality and predictability, the arrow of time determines which facts affect the future, new technologies may change work's nature but not reduce overall jobs, papers and patents might be less disruptive in some fields, and AI-assisted coding and quantum networking are examples of these concepts.

      Entropy, the increasing disorder in the universe, shapes the causality and predictability of events. While some aspects of the universe may be predictable, others are not due to quantum mechanics and our limited knowledge of the microstate of the universe. The arrow of time, which moves from past to future, plays a crucial role in determining which facts propagate into the future and affect it, but not the past. Regarding technology and the workforce, the introduction of new technologies, such as large language models, may not reduce the overall need for jobs but could change the nature of work. For instance, AI programs can help generate code, but they still make mistakes and require human oversight. In the realm of science and innovation, papers and patents might be becoming less disruptive over time. This could be due to several reasons, such as the maturing of science, fewer low-hanging fruits, or the replication crisis. However, it's essential to consider the vast differences between various fields of science and engineering when discussing this topic. Jason Ricciardi, a quantum computing expert, discussed these ideas while sharing his experiences with AI-assisted coding and reviewing Bell States in quantum networking. Philip Malinowski, a researcher, raised the question of the decreasing disruptiveness of papers and patents in a recent Nature paper.

    • Understanding the Universe's Age and the Evolution of ScienceThe perception of science becoming less disruptive over time might be influenced by the sample of scientists or fields being studied. Looking at distant galaxies allows us to look back in time and determine their age by measuring their redshift, but the exact age of photons depends on their distance.

      The perception of science becoming less disruptive over time may be influenced by the sample of scientists or fields being studied. The easy maturation of some sciences and the emergence of new ones can coexist. Regarding the second question, looking at distant galaxies allows us to look back in time due to the time it takes for light to reach us. The age of these objects is determined by measuring their redshift, which tells us how much the universe has expanded since the light was emitted. While we have a good understanding of the universe's expansion, determining the exact age of photons depends on their distance. Overall, our understanding of the universe's age and the evolution of science is a complex interplay of various factors.

    • The nature of infinities in physicsWhile our theories may involve infinite or uncountable quantities, it's unclear if the universe itself truly embodies these infinities. The Hilbert space, which describes the state of a quantum system, could be infinite or finite, and the nature of the whole universe's Hilbert space remains an open question.

      Our understanding of the universe and its complexities involves dealing with different kinds of infinities in physics, particularly countable and uncountable infinities. While our theories may invoke these infinities, it is not yet known if the world itself truly embodies them. For instance, the quantum Hilbert space, which describes the state of a quantum system, could be infinite or finite dimensional, but this is still an open question. Even if the universe is fundamentally discrete and finite, the number of finite things happening in it is so vast that infinity is a useful approximation. Ultimately, the nature of the Hilbert space of the whole universe remains an intriguing and unanswered question.

    • The occurrence of rare events in one universe does not guarantee their continuation in that or any other universe.In the Everettian multiverse, each universe's events are independent, and focusing on rare branches can create discomfort. Bayesian epistemology involves initial and updated probabilities, with the choice of a prior being crucial.

      In the Everettian multiverse, the occurrence of rare events in a particular universe does not imply that unlikely events will continue to happen in that universe or any other. Nicholas Vaucrot emphasizes that these events are independent of each other. Furthermore, people's discomfort with the concept of many worlds often stems from focusing on the rare and unlikely branches of the wave function. In the context of Bayesian epistemology, having a prior belief is just the initial probability assigned to a proposition before new evidence is gathered. The posterior belief is the updated probability after new evidence is considered. The choice of a prior is crucial in Bayesian reasoning, and while data eventually overpowers the prior, it can be challenging to determine what the prior should be in practice. The debate between Bayesian and non-Bayesian approaches ultimately boils down to the choice of a prior and the interpretation of probability.

    • The Commodification of Brain Data and Baltimore's Unique CharmThe advancement of brain-reading technology raises concerns about privacy invasion and potential corporate exploitation. Legislation and legal principles are needed to protect brain data privacy. Baltimore, a less famous city, offers a great quality of life and sense of community often overlooked.

      We should be concerned about the commodification of brain data and the potential invasion of privacy that comes with it. Despite the convenience it may offer, there is a risk that corporations will exploit this technology without regard for individual privacy. The urgency of this issue lies in the fact that it is already happening with other forms of data, and it is likely to only become more pervasive as brain-reading technology advances. Legislation and legal principles are necessary to protect individuals' brain data privacy and prevent potential abuses. Additionally, Baltimore, a city often overlooked, has a unique charm and attitude that sets it apart from other cities. Despite not being as famous or vibrant as some other US cities, Baltimore offers a great quality of life and a sense of community that is often overlooked.

    • Finding the right team for publishing a bookHaving an agent is crucial for authors looking to publish trade or popular books. They help filter through potential publishers and secure a good editor to shape the book into a quality product.

      When it comes to publishing a trade book or a popular book, having an agent is crucial. An agent acts as an author's advocate and helps filter through potential publishers to find the best fit. While academic presses may be more inclined to publish academically respectable works, commercial presses are better equipped to help a book reach a wider audience. Agents can also help authors secure a good editor within a publishing company, someone who will edit the book and collaborate with the author to shape it into a quality product. Publicists, on the other hand, are typically provided by major publishing houses, and their effectiveness can vary greatly. Overall, the process of publishing a book involves many steps, and having the right team in place can make all the difference.

    • Navigating the Uncertainty of Public Relations and Dark MatterPublic relations involve building relationships and connecting authors to platforms, but contracts can introduce uncertainty. Dark matter interacts gravitationally but behaves differently due to its collisionless nature, leading to observed galactic structures.

      In the world of publishing, a good publicist plays a crucial role in connecting authors with suitable venues. They build personal relationships and ensure the right authors meet the right publicity platforms. However, the experience can be uncertain as one must sign a contract before fully understanding the working relationship with an editor and publicist. Meanwhile, in the realm of physics, dark matter behaves differently than ordinary matter. Despite its gravitational interaction, it doesn't lump together as efficiently due to its collisionless nature. Particles just slide through each other, but they can still collectively lose energy and form larger structures, leading to the observed size of galactic halos. Regarding quantum mechanics, it's theoretically possible for a living being or a physicist to be in superposition for an appreciable period. However, the practical implementation depends on one's interpretation of quantum mechanics. For Everettians, it's easy, but for those believing in objective collapse, the answer would be different. Putting two things into superposition on a single branch of the wave function is challenging because systems interact with their environments, causing decoherence and branching of the wave function. Therefore, they cannot remain in superposition indefinitely.

    • Exploring the complexities of reality in quantum physics and philosophyQuantum physics and philosophy raise questions about reality's nature and our understanding's limits. Superposition in quantum physics complicates wave function branches and entanglement location. Philosophy's skeptical scenarios challenge perceptions of reality, while ethics' foundations strengthen claims.

      The fields of quantum physics and philosophy raise intriguing questions about the nature of reality and the limits of our understanding. In quantum physics, the concept of superposition raises complexities when it comes to the branches of the wave function and the location of entanglement. Meanwhile, in philosophy, skeptical scenarios such as the Boltzmann brain paradox and the simulation argument challenge our perceptions of reality. Although these concepts share similarities, they also have distinct differences, particularly in their definition and predictability. Furthermore, the relationship between normative ethics and metaethics was discussed, with the consensus being that understanding the metaethical foundation of moral claims can strengthen the normative ethical claims themselves. Overall, these discussions highlight the importance of exploring the complexities of our understanding of reality and the role of philosophy in interpreting it.

    • Comparing Ethics and Metaethics to Everyday Experiences and Scientific FoundationsEven with differing metaethical principles, ethical rules can be agreed upon and coexist peacefully.

      The relationship between ethical rules and metaethical principles can be compared to the relationship between our everyday experiences and their underlying scientific foundations. While it's nice to have a deep understanding of the foundations, we can still get by in our daily lives without them. Even if two people have vastly different metaethical principles, they can still agree on ethical rules and coexist peacefully. Another topic discussed was the probability of aliens discovering the ability to travel faster than light or perform magic. While both are highly unlikely, the ability to travel faster than light is slightly more plausible due to the possibility of slight modifications to known laws of physics. The ability to perform magic, on the other hand, is much less likely as it defies our current understanding of physics. Lastly, a discussion about poetry and its appreciation ensued. It was acknowledged that engaging with poetry requires effort and time, but it can be a rewarding experience. Some favorite poets were shared, including Dante, Homer, James Merrill, Adrian Rich, Wendy Cope, John Ashbery, EE Cummings, and Walt Whitman. Overall, the conversation touched on various topics, from philosophy and ethics to science and poetry. Despite the differences in perspectives, the participants found common ground and shared their thoughts respectfully.

    • Quantum physics doesn't allow for downward causationAt the quantum level, particles behave based on their local environment, not the larger context. However, in complex systems, downward causation might be useful.

      When it comes to the relationship between the microscopic and macroscopic worlds in physics, there's no room for downward causation at the quantum level. The behavior of particles like electrons is determined solely by their local environment, and they don't take into account the larger context in which they're embedded. However, when it comes to complex systems like human beings and society, downward causation might be a useful concept. Regarding quantum mechanics and cosmology, the use of quantum rules in cosmology is considered "half-assed" because we don't fully understand how to quantize gravity or apply quantum mechanics to the early universe, where there are no observers to make measurements. Instead, we use classical descriptions of space-time and quantize fields on that background. The rules of quantum mechanics that work well in particle physics don't make sense when applied to the early universe, and some physicists argue that there's no such thing as measurements in the early universe, only decoherence and evolution of the full quantum wave function.

    • Clarifying complex concepts in physicsPrecise language, deep understanding, and careful consideration are crucial when discussing complex topics in physics, such as quantum fluctuations, the nature of space, and human-machine rights.

      During discussions on complex topics in physics, such as quantum fluctuations during eternal inflation or the nature of space, it's essential to clarify concepts and understand the nuances. For instance, while most physicists favor treating space as a substance, the distinction between substantivalism and relationalism might not be as relevant or clear-cut as one might think. Similarly, in quantum mechanics, the concept of entropy is objective for subsystems but not for the overall system due to entanglement. Regarding the potential conflict between human and machine rights, it's important to consider the implications of advanced AI and carefully define what we mean by an agent deserving rights. The comparison of connection numbers in GPT-4 to synapses in the human brain might not be directly relevant to this issue. Overall, these discussions highlight the importance of precise language, deep understanding, and careful consideration when tackling complex topics in physics and related fields.

    • AI's Personhood and RightsThe question of whether AI should be granted personhood and rights is a complex issue, as they lack essential human features and clear criteria for granting rights have yet to be established.

      The question of whether artificial intelligence (AI) should be considered persons with rights is a complex issue that requires careful consideration. While AI, such as large language models, can mimic human behavior and creativity, they lack essential features of living beings, such as emotions and self-awareness. The criteria for granting rights to AI are not yet clear, and further thought is needed. Additionally, in the realm of quantum mechanics, the distinction between position and momentum in the real world is not found in the equivalent formulations of the theory. Instead, the behavior of a quantum system in the classical world emerges when it is monitored by the environment in a specific way. These findings highlight the complex relationship between quantum mechanics and the classical world and the ongoing exploration of these concepts.

    • Interacting with the environment in quantum mechanics limits observation to one variableIn quantum mechanics, observing a system's interaction with its environment restricts us to monitoring only one variable at a time due to physical laws and the nature of the Hamiltonian.

      In quantum mechanics, when a system interacts with its environment, it can only monitor and maintain a classical behavior by focusing on one variable, such as position. This is due to the laws of physics and the specific properties of the Hamiltonian. In quantum field theory, a quantized classical field can be described as particles through the concept of modes and their quantum states. Each mode can have its own quantum state, and a particle is represented by the first excited state of a number of modes. This means that a single particle can be a superposition of many modes, and multiple particles can be represented by different superpositions of excited states. The study of multiple time dimensions in physics is an area of research, but it presents challenges as it can lead to time loops and a breakdown of fundamental concepts.

    • Exploring closed time-like curves in physicsWhile closed time-like curves are a theoretical concept in physics, their analysis using braid theory is not directly applicable, and visualization is complex. Quantum field theory, a local theory, is non-local as a whole due to quantum mechanics' non-locality.

      While the concept of multiple time dimensions, or closed time-like curves (CTCs), has been explored in theoretical physics, it lacks motivation and practical application compared to the addition of extra dimensions in space. The discussion highlighted that the analysis of CTCs using braid theory is not directly applicable, and the visualization of such curves is a complex and challenging task. Moreover, quantum field theory, the most advanced version of quantum mechanics, is considered a local theory, meaning the properties of a quantum field depend on its immediate surroundings. However, quantum mechanics as a whole, including quantum field theory, is non-local according to Bell's theorem. The resolution to this apparent contradiction lies in understanding that quantum field theory's locality refers to its unitary evolution when unobserved, while quantum mechanics' non-locality pertains to its behavior when observed.

    • Understanding Quantum Theory and Local Quantum Field TheoryQuantum theory and local quantum field theory address different aspects of quantum systems, with quantum theory focusing on dynamics before measurement and local quantum field theory on correlations during measurement.

      Quantum theory and local quantum field theory are not contradictory, as they address different aspects of quantum systems: dynamics before measurement versus correlations during measurement. David Deutsch, the interviewee, shares his diverse professional activities, including teaching, podcasting, and writing, emphasizing that there's no one-size-fits-all approach to productivity and work-life balance. Regarding the use of neural networks in AI research and understanding the human mind, Rafael Millier's perspective doesn't present a contradiction but rather highlights the complexity of the research process. Neural networks might not function exactly like human neurons, but they offer valuable insights into the human mind's workings. The use of airplanes to study bird flight is an imperfect analogy, but it doesn't prevent us from learning essential information. Ultimately, the quest for knowledge in science is a challenging, intricate process that requires dedication and continuous learning.

    • Understanding the Complexities of the Human Brain through Neural NetworksNeural networks offer insights into the complexities of the human brain, inspiring a quantitative and careful approach to understanding complex phenomena. Extremal black holes, a theoretical construct, are unlikely to exist in practice.

      While we can't directly apply the workings of neural networks to the human brain, we can be inspired by the insights gained from studying neural networks to better understand the complexities of the human brain. This is similar to how physics concepts can inspire our understanding of social structures. Regarding the physical world, objects appear solid due to the vast number of molecules and intermolecular forces at play, despite the small forces between individual molecules. This is a reminder that we should approach complex phenomena with a quantitative and careful mindset. As for the question about extremal black holes, the answer is that an extremal black hole is a theoretical construct where the mass is balanced by an extreme amount of electric charge. However, it's unlikely that such a black hole can exist in practice.

    • Exploring the Unique Properties of Extremal Black HolesResearch reveals new insights into the behavior of extremal black holes, challenging GR predictions and highlighting their unique properties. AI tools advance rapidly, offering unprecedented change but with limitations.

      While the concept of a positively charged black hole is theoretically intriguing, making one is challenging due to the strong electromagnetic field repelling charged particles. Researchers, including Lisa Randall and Matthew Johnson, have studied the differences between the space-time diagrams of almost extremal and extremal black holes, discovering a region called "Whoville" that disappears at the extremal limit. This finding sheds light on the unique properties of extremal black holes. Regarding the GR predictions, the internal structure of an extreme old black hole, as described by exact solutions in general relativity textbooks, may not accurately represent the real world. However, uncharged objects will still experience a similar gravitational field, with a horizon preventing escape. Julie Mars expressed her excitement about the rapid advancements in AI tools, comparing it to the advent of personal computing and the Internet. While acknowledging the potential impact, the speakers cautioned against overestimating the capabilities of these tools and emphasized the importance of understanding their limitations. The rate of change brought about by AI is unprecedented, and its applications will likely be ubiquitous, but the full extent of its impact remains to be seen.

    • The uncertain future of AI and its potential impact on our livesIdentify personal philosophical interests and engage in dialogue between scientific insights and philosophical inquiries for a better understanding of the world.

      The future of artificial intelligence (AI) is uncertain and raises valid concerns about safety and potential negative impacts on our quality of life. Despite the ongoing debates about the benefits and drawbacks of technology like social media and smartphones, human beings have a tendency to focus on short-term gains rather than considering the long-term implications. Regarding philosophy, the speaker emphasizes that it's essential to identify the philosophical questions that interest you before diving into reading philosophers. The value and usefulness of philosophy depend on individual interests, and there is no one-size-fits-all approach. The speaker also advocates for more interaction between scientific insights and philosophical inquiries, as they can complement each other and lead to a better understanding of the world.

    • Interdisciplinary work in science and philosophyPassionate about research area, interdisciplinary work benefits both fields. PhD investment, be passionate. Comments increase chances of answered questions.

      There is a growing trend towards interdisciplinary work in science and philosophy, with philosophers taking a more serious approach to scientific concepts and scientists benefiting from philosophical insights. Regarding career advice, a PhD is a significant investment of time and energy, and it's crucial to be passionate about the research area to make the most of the experience. The number of likes or hearts on a question during a Q&A session has little impact on the decision to answer it, but leaving a comment expressing interest or support for a question can help increase its chances of being addressed. Lastly, the idea of gauge fields and fictitious forces may seem similar, but they have fundamental differences. While fictitious forces can be explained away as mathematical constructs, gauge fields are physical phenomena that describe how particles interact with their environment. The analogy may be helpful in understanding the concept, but it's essential to recognize the distinctions between them.

    • Physics Concepts in Social SciencesPhysics concepts like forces and curvature apply to social sciences, specifically in understanding complex systems. Branches like statistical mechanics and network theories are useful. Quantum entanglement doesn't allow for faster-than-light info transfer, only correlations.

      The concepts of physics, such as forces and curvature, can be applied to social sciences, specifically in understanding the relationship between microscopic (individuals) and macroscopic (societies or governments) entities. These branches of physics, like statistical mechanics and network theories, are useful because they deal with the behavior of complex systems, despite being simpler and more abstract in nature. Furthermore, certain branches of physics, such as quantum theory and relativity, are not directly applicable to social sciences due to their focus on the behavior of subatomic particles and high speeds, respectively, which are not relevant to the classical and non-relativistic nature of human behavior. Another key point discussed was the misconception that quantum entanglement allows for faster-than-light information transfer. However, it only implies correlations between measurements, and no actual information is passed between entangled particles. Lastly, the speaker emphasized the importance of subjectivity in personal preferences, even in seemingly rigid contexts like cocktail making, and the willingness to accommodate others' preferences to ensure their happiness.

    • Personal Preferences and Balance in Cocktail MakingIndividual taste and balance are key in creating a perfect martini. Gin, vermouth, and garnishes can be customized based on personal preference and mood.

      The speaker has a strong preference for gin-based martinis with a reasonable amount of vermouth, and values the balance of flavors that a cocktail provides. They also emphasize the importance of garnishes, but not in overpowering quantities. The speaker shares their personal process of making flavored gin at home and expresses their disagreement with the "macho" notion that less vermouth equals a better martini. They encourage individual aesthetic choices and suggest that the choice of gin, vermouth, and garnishes depends on personal preference and mood. The speaker also mentions their current favorite gin, Saint George's terroir gin, and shares an alternative option for a blue-colored martini using Indigo gin and a lemon twist garnish.

    Recent Episodes from Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas

    288 | Max Richter on the Meaning of Classical Music Today

    288 | Max Richter on the Meaning of Classical Music Today

    It wasn't that long ago, historically speaking, that you might put on your tuxedo or floor-length evening gown to go out and hear a live opera or symphony. But today's world is faster, more technologically connected, and casual. Is there still a place for classical music in the contemporary environment? Max Richter, whose new album In a Landscape releases soon, proves that there is. We talk about what goes into making modern classical music, how musical styles evolve, and why every note should count.

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/09/09/288-max-richter-on-the-meaning-of-classical-music-today/

    Max Richter trained in composition and piano at Edinburgh University, at the Royal Academy of Music, and with Luciano Berio in Florence. He was a co-founder of the ensemble Piano Circus. His first solo album, "Memoryhouse," was released in 2002. He has since released numerous solo albums, as well as extensive work on soundtracks for film and television, ballet, opera, and collaborations with visual artists.


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    AMA | September 2024

    AMA | September 2024

    Welcome to the September 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic. Enjoy!

    Blog post with AMA questions and transcript: https://www.preposterousuniverse.com/podcast/2024/09/02/ama-september-2024/

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    287 | Jean-Paul Faguet on Institutions and the Legacy of History

    287 | Jean-Paul Faguet on Institutions and the Legacy of History

    One common feature of complex systems is sensitive dependence on initial conditions: a small change in how systems begin evolving can lead to large differences in their later behavior. In the social sphere, this is a way of saying that history matters. But it can be hard to quantify how much certain specific historical events have affected contemporary conditions, because the number of variables is so large and their impacts are so interdependent. Political economist Jean-Paul Faguet and collaborators have examined one case where we can closely measure the impact today of events from centuries ago: how Colombian communities are still affected by 16th-century encomienda, a colonial forced-labor institution. We talk about this and other examples of the legacy of history.

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/08/26/287-jean-paul-faguet-on-institutions-and-the-legacy-of-history/

    Jean-Paul Faguet received a Ph.D. in Political Economy and an M.Sc. in Economics from the London School of Economics, and an Master of Public Policy from the Kennedy School of Government at Harvard. He is currently Professor of the Political Economy of Development at LSE. He serves as the Chair of the Decentralization Task Force for the Initiative for Policy Dialogue. Among his awards are the W.J.M. Mackenzie Prize for best political science book.


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    286 | Blaise Agüera y Arcas on the Emergence of Replication and Computation

    286 | Blaise Agüera y Arcas on the Emergence of Replication and Computation

    Understanding how life began on Earth involves questions of chemistry, geology, planetary science, physics, and more. But the question of how random processes lead to organized, self-replicating, information-bearing systems is a more general one. That question can be addressed in an idealized world of computer code, initialized with random sequences and left to run. Starting with many such random systems, and allowing them to mutate and interact, will we end up with "lifelike," self-replicating programs? A new paper by Blaise Agüera y Arcas and collaborators suggests that the answer is yes. This raises interesting questions about whether computation is an attractor in the space of relevant dynamical processes, with implications for the origin and ubiquity of life.

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/08/19/286-blaise-aguera-y-arcas-on-the-emergence-of-replication-and-computation/

    Blaise Agüera y Arcas received a B.A. in physics from Princeton University. He is currently a vice-president of engineering at Google, leader of the Cerebra team, and a member of the Paradigms of Intelligence team. He is the author of the books Ubi Sunt and Who Are We Now?, and the upcoming What Is Intelligence?


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    285 | Nate Silver on Prediction, Risk, and Rationality

    285 | Nate Silver on Prediction, Risk, and Rationality

    Being rational necessarily involves engagement with probability. Given two possible courses of action, it can be rational to prefer the one that could possibly result in a worse outcome, if there's also a substantial probability for an even better outcome. But one's attitude toward risk -- averse, tolerant, or even seeking -- also matters. Do we work to avoid the worse possible outcome, even if there is potential for enormous reward? Nate Silver has long thought about probability and prediction, from sports to politics to professional poker. In his his new book On The Edge: The Art of Risking Everything, Silver examines a set of traits characterizing people who welcome risks.

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/08/12/285-nate-silver-on-prediction-risk-and-rationality/

    Nate Silver received a B.A. in economics from the University of Chicago. He worked as a baseball analyst, developing the PECOTA statistical system (Player Empirical Comparison and Optimization Test Algorithm). He later founded the FiveThirtyEight political polling analysis site. His first book, The Signal and the Noise, was awarded the Phi Beta Kappa Society Book Award in Science. He is the co-host (with Maria Konnikova) of the Risky Business podcast.


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    AMA | August 2024

    AMA | August 2024

    Welcome to the August 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic. Enjoy!

    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/08/05/ama-august-2024/

    Support Mindscape on Patreon: https://www.patreon.com/seanmcarroll

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    284 | Doris Tsao on How the Brain Turns Vision Into the World

    284 | Doris Tsao on How the Brain Turns Vision Into the World

    The human brain does a pretty amazing job of taking in a huge amount of data from multiple sensory modalities -- vision, hearing, smell, etc. -- and constructing a coherent picture of the world, constantly being updated in real time. (Although perhaps in discrete moments, rather than continuously, as we learn in this podcast...) We're a long way from completely understanding how that works, but amazing progress has been made in identifying specific parts of the brain with specific functions in this process. Today we talk to leading neuroscientist Doris Tsao about the specific workings of vision, from how we recognize faces to how we construct a model of the world around us.

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/07/29/284-doris-tsao-on-how-the-brain-turns-vision-into-the-world/

    Doris Tsao received her Ph.D. in neurobiology from Harvard University. She is currently a professor of molecular and cell biology, and a member of the Helen Wills Neuroscience Institute, at the University of California, Berkeley. Among her awards are a MacArthur Fellowship, membership in the National Academy of Sciences, the Eppendorf and Science International Prize in Neurobiology, the National Institutes of Health Director’s Pioneer Award, the Golden Brain Award from the Minerva Foundation, the Perl-UNC Neuroscience Prize, and the Kavli Prize in Neuroscience.

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    283 | Daron Acemoglu on Technology, Inequality, and Power

    283 | Daron Acemoglu on Technology, Inequality, and Power

    Change is scary. But sometimes it can all work out for the best. There's no guarantee of that, however, even when the change in question involves the introduction of a powerful new technology. Today's guest, Daron Acemoglu, is a political economist who has long thought about the relationship between economics and political institutions. In his most recent book (with Simon Johnson), Power and Progress: Our Thousand-Year Struggle Over Technology and Prosperity, he looks at how technological innovations affect the economic lives of ordinary people. We talk about how such effects are often for the worse, at least to start out, until better institutions are able to eventually spread the benefits more broadly.

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/07/22/283-daron-acemoglu-on-technology-inequality-and-power/

    Daron Acemoglu received a Ph.D. in economics from the London School of Economics. He is currently Institute Professor at the Massachusetts Institute of Technology. He is a fellow of the National Academy of Sciences, the American Academy of Arts and Sciences, and the Econometric Society. Among his awards are the John Bates Clark Medal and the Nemmers Prize in Economics. In 2015, he was named the most cited economist of the past 10 years.


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    282 | Joel David Hamkins on Puzzles of Reality and Infinity

    282 | Joel David Hamkins on Puzzles of Reality and Infinity

    The philosophy of mathematics would be so much easier if it weren't for infinity. The concept seems natural, but taking it seriously opens the door to counterintuitive results. As mathematician and philosopher Joel David Hamkins says in this conversation, when we say that the natural numbers are "0, 1, 2, 3, and so on," that "and so on" is hopelessly vague. We talk about different ways to think about the puzzles of infinity, how they might be resolved, and implications for mathematical realism.

    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/07/15/282-joel-david-hamkins-on-puzzles-of-reality-and-infinity/

    Support Mindscape on Patreon.

    Joel David Hamkins received his Ph.D. in mathematics from the University of California, Berkeley. He is currently the John Cardinal O'Hara Professor of Logic at the University of Notre Dame. He is a pioneer of the idea of the set theory multiverse. He is the top-rated user by reputation score on MathOverflow. He is currently working on The Book of Infinity, to be published by MIT Press.


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    Ask Me Anything | July 2024

    Ask Me Anything | July 2024

    Welcome to the July 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic. Enjoy!

    Blog post with questions and transcript: https://www.preposterousuniverse.com/podcast/2024/07/08/ama-july-2024/

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    Related Episodes

    43 | Matthew Luczy on the Pleasures of Wine

    43 | Matthew Luczy on the Pleasures of Wine
    Some people never drink wine; for others, it’s an indispensable part of an enjoyable meal. Whatever your personal feelings might be, wine seems to exhibit a degree of complexity and nuance that can be intimidating to the non-expert. Where does that complexity come from, and how can we best approach wine? To answer these questions, we talk to Matthew Luczy, sommelier and wine director at Mélisse, one of the top fine-dining restaurants in the Los Angeles area. Matthew insisted that we actually drink wine rather than just talking about it, so drink we do. Therefore, in a Mindscape first, I recruited a third party to join us and add her own impressions of the tasting: science writer Jennifer Ouellette, who I knew would be available because we’re married to each other. We talk about what makes different wines distinct, the effects of aging, and what’s the right bottle to have with pizza. You are free to drink along at home, with exactly these wines or some other choices, but I think the podcast will be enjoyable whether you do or not. Support Mindscape on Patreon or Paypal. Mattew Luczy is a Certified Sommelier as judged by the Court of Master Sommeliers. He currently works as the Wine Director at Mélisse in Santa Monica, California. He is also active in photography and music. Mélisse home page Personal/photography page Instagram Ask a Somm: When Should I Decant Wine? See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

    25 | David Chalmers on Consciousness, the Hard Problem, and Living in a Simulation

    25 | David Chalmers on Consciousness, the Hard Problem, and Living in a Simulation
    The "Easy Problems" of consciousness have to do with how the brain takes in information, thinks about it, and turns it into action. The "Hard Problem," on the other hand, is the task of explaining our individual, subjective, first-person experiences of the world. What is it like to be me, rather than someone else? Everyone agrees that the Easy Problems are hard; some people think the Hard Problem is almost impossible, while others think it's pretty easy. Today's guest, David Chalmers, is arguably the leading philosopher of consciousness working today, and the one who coined the phrase "the Hard Problem," as well as proposing the philosophical zombie thought experiment. Recently he has been taking seriously the notion of panpsychism. We talk about these knotty issues (about which we deeply disagree), but also spend some time on the possibility that we live in a computer simulation. Would simulated lives be "real"? (There we agree -- yes they would.) David Chalmers got his Ph.D. from Indiana University working under Douglas Hoftstadter. He is currently University Professor of Philosophy and Neural Science at New York University and co-director of the Center for Mind, Brain, and Consciousness. He is a fellow of the Australian Academy of Humanities, the Academy of Social Sciences in Australia, and the American Academy of Arts and Sciences. Among his books are The Conscious Mind: In Search of a Fundamental Theory, The Character of Consciousness, and Constructing the World. He and David Bourget founded the PhilPapers project. Web site NYU Faculty page Wikipedia page PhilPapers page Amazon author page NYU Center for Mind, Brain, and Consciousness TED talk: How do you explain consciousness? See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

    18 | Clifford Johnson on What's So Great About Superstring Theory

    18 | Clifford Johnson on What's So Great About Superstring Theory
    String theory is a speculative and highly technical proposal for uniting the known forces of nature, including gravity, under a single quantum-mechanical framework. This doesn't seem like a recipe for creating a lightning rod of controversy, but somehow string theory has become just that. To get to the bottom of why anyone (indeed, a substantial majority of experts in the field) would think that replacing particles with little loops of string was a promising way forward for theoretical physics, I spoke with expert string theorist Clifford Johnson. We talk about the road string theory has taken from a tentative proposal dealing with the strong interactions, through a number of revolutions, to the point it's at today. Also, where all those extra dimensions might have gone. At the end we touch on Clifford's latest project, a graphic novel that he wrote and illustrated about how science is done. Clifford Johnson is a Professor of Physics at the University of Southern California. He received his Ph.D. in mathematics and physics from the University of Southampton. His research area is theoretical physics, focusing on string theory and quantum field theory. He was awarded the Maxwell Medal from the Institute of Physics. Johnson is the author of the technical monograph D-Branes, as well as the graphic novel The Dialogues. Home page Wikipedia page Publications A talk on The Dialogues Asymptotia blog Twitter See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

    AMA | November 2021

    AMA | November 2021

    Welcome to the November 2021 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). I take the large number of questions asked by Patreons, whittle them down to a more manageable size — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy!

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    AMA | March 2024

    AMA | March 2024

    Welcome to the March 2024 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number -- based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good -- and sometimes group them together if they are about a similar topic.

    Big congrats this month to Ryan Funakoshi, winner of this year's Mindscape Big Picture Scholarship! And enormous, heartfelt thanks to everyone who contributed. We're going to keep doing this in years to come.

    Blog post with questions and transcript: https://www.preposterousuniverse.com/podcast/2024/03/11/ama-march-2024/

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