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    AMA | March 2023

    enMarch 06, 2023
    What platform is recommended for hiring candidates efficiently?
    How does Rocket Money help manage personal finances?
    What unique feature does FedEx offer for deliveries in the US?
    How is black hole entropy related to its area?
    What drives human exploration and discovery according to the text?

    Podcast Summary

    • Find the right tools for hiring and managing financesIndeed saves time and money for businesses hiring with high-quality matches and features. Rocket Money helps individuals save money by finding and canceling subscriptions and monitoring spending. FedEx ensures efficient package delivery with fast services and simple returns.

      When it comes to hiring or managing your personal finances, utilizing the right platforms can save you time and money. For hiring, Indeed is a powerful matching and hiring platform with over 350 million monthly visitors and a matching engine that helps you find quality candidates quickly. It also offers features for scheduling, screening, and messaging. With 93% of employers agreeing that Indeed delivers the highest quality matches compared to other job sites, it's a valuable resource for businesses looking to hire efficiently. For managing personal finances, Rocket Money is a personal finance app that helps users find and cancel unwanted subscriptions, monitor spending, and lower bills. With over 5 million users and an average savings of $720 per year, it's a valuable tool for individuals looking to save money and streamline their finances. Additionally, FedEx offers fast and reliable delivery services, simple returns, and weekend home delivery to 98% of the US population, ensuring that businesses can efficiently send and receive packages. In the broader context, these tools serve as reminders that there are resources available to help us navigate the complexities of hiring and managing our finances. By utilizing these tools, we can save time, money, and reduce stress.

    • New theory suggests black holes as source of dark energyResearchers propose black holes grow faster than believed, potentially explaining dark energy's accelerating expansion. Skepticism expressed, further resources available.

      A group of researchers have proposed a new theory suggesting that supermassive black holes could be the source of dark energy in the universe, accelerating its expansion. The theory, put forth in a recent paper by Duncan Farrar and collaborators, suggests that black holes grow faster than previously believed, maintaining a constant energy density as the universe expands. However, physicist Sean Carroll expresses skepticism towards the theory, stating that he hasn't read the papers carefully but finds the idea unlikely based on his current understanding. He emphasizes the importance of the dark energy mystery and the potential implications of this theory if it were true. Additionally, resources such as podcast transcripts, AMA records, and show notes are available for those interested in exploring the topic further.

    • Scientist's skepticism towards black holes as source of dark energyDespite new theories, scientists remain skeptical when findings contradict expectations and provide compelling reasons for readers to consider new ideas, emphasizing critical thinking and rigorous evaluation in scientific research.

      Scientists, even those with expertise in a particular field like cosmology, have valid reasons for being skeptical when new theories or findings contradict their expectations and intuitions. The speaker in this discussion, who has a deep understanding of dark energy and general relativity, expressed skepticism towards certain papers suggesting black holes as the source of dark energy due to their apparent contradiction with conventional physics. He emphasized the importance of acknowledging and addressing such contradictions and providing compelling reasons for readers to consider new ideas. Additionally, the speaker raised questions about the implications of these theories, such as the mass and energy content of black holes and their behavior in relation to dark energy. Overall, the discussion highlights the importance of critical thinking and rigorous evaluation in scientific research.

    • Understanding the Universe and Defining Meaning in Life: Factors and DebatesOur understanding of the universe and personal beliefs shape theories. The past hypothesis of a low entropy early universe is unexplained, with alternative ideas proposing brute facts. The best theory posits a hot, dense, low entropy state 13.7 billion years ago. Meaning can be subjective or objectively constructed, with ongoing debates.

      Our understanding of the world and the theories we construct about it are shaped by various factors, including data, simplicity, naturalness, and personal beliefs. The past hypothesis, which suggests the early universe had low entropy, is currently an unexplained fact. Some propose alternative brute facts, such as the universe existing 10 minutes ago, but these come with their own challenges. The best theory we have now posits the universe began as a hot, dense, low entropy state 13.7 billion years ago. In the realm of meaning, some argue for constructivism, creating a theory of meaning and judging those who fail to meet our standards. Others believe meaning is subjective and personal, and we cannot objectively judge others' choices of meaning in life. Ultimately, the quest for understanding the universe and defining meaning in life is a complex and ongoing process.

    • Exploring the Complexity of Life and Quantum MechanicsLife and quantum mechanics both offer intricate layers of meaning. Quantum mechanics uses complex numbers for convenience, while we should seek meaning from various sources to enrich our lives.

      We should draw meaning from various sources in our lives, whether it's from religious texts, fiction, movies, friends, or inner contemplations. The complexity of the wave function in quantum mechanics is an essential starting point, and it's conveniently represented using complex numbers. This complexity leads to important concepts such as wave function evolution and interference effects that maintain the probability rule. Regarding personal matters, I believe I have enough interests to last several thousand years if given the opportunity to extend my human lifetime. If I were to pursue a new career distinct from research, I'm not sure what it would be. However, I can imagine a phase of my life where research would not be the central activity, allowing me to explore other passions and hobbies. The Schrodinger equation itself doesn't need to be complex valued; it's the wave function that is, and the choice to use complex numbers is based on convenience. The question of why quantum mechanics chooses complex numbers as the most convenient representation might never have a completely satisfactory answer.

    • Embracing New Experiences and Learning as We AgeStay open-minded and curious to embrace new experiences, learn new things, and adapt to life's evolving journey. Utilize tools like Babbel to expand horizons and connect with new cultures.

      Our lives are constantly evolving, and we have the potential to change and grow in various ways throughout our existence, whether it lasts for a few decades or a thousand years. The speaker expresses a personal preference for embracing new experiences and learning new things as they age, but acknowledges that everyone's journey is unique. They also highlight the importance of staying open-minded and curious, as one never knows what opportunities or discoveries may arise. Additionally, the speaker recommends the language learning app Babbel as a valuable tool for expanding one's horizons and connecting with new cultures. Overall, the discussion emphasizes the value of personal growth, adaptability, and a willingness to explore new ideas and experiences.

    • The quantum world is not empty space with freely moving wave packets, but rather, interacting spherical waves leading to particle-like behavior.Quantum mechanics is complex and involves spherical waves interacting and decohering, leading to observed particle behavior, not empty space with freely moving wave packets.

      The real world of quantum mechanics does not consist of freely moving wave packets in empty space, but rather, large spherical waves that interact and decohere, resulting in the observation of particle-like behavior. This was discussed in the context of wave packets and the apparent particle tracks left behind in detectors. The speaker also touched upon the concept of spending the rest of one's life alone with access to all human knowledge, pondering the question of whether one would still have anything to say and how the lack of immediate feedback would impact the creative process. Overall, the conversation highlighted the intricacies of quantum mechanics and the importance of understanding the underlying wave nature of particles.

    • The value of creating and sharing work goes beyond feedback and recognitionCreating and sharing work brings personal fulfillment and motivation, even without external validation. A more effective grant system could focus on past achievements instead of speculative proposals.

      The value of creating and sharing work extends beyond the feedback and recognition we receive from others. Even if the response is uncertain or nonexistent, the act of writing, researching, and learning can provide personal fulfillment and motivation. However, in the context of academic research grants, a more effective system might be one where funding is based on past achievements rather than speculative proposals. This could save time and resources, especially for established researchers who have a proven track record of success. Blind reviewing, while useful in some contexts, may not be as effective for grant proposals as it is for academic papers. Overall, the focus should be on recognizing and supporting the value and impact of researchers' work, rather than the guesswork involved in evaluating proposals.

    • Focus on proposal cogency in grant applicationsGrant review committees prioritize proposal coherence over applicant reputation, opening opportunities for newcomers with innovative ideas.

      When it comes to new grant applications, the focus should be on the proposal's cogency rather than the applicant's past accomplishments or reputation. This approach can lead to funding for unknown individuals with promising ideas, but it's crucial to remember that grant review committees take their responsibilities seriously and evaluate proposals carefully. Regarding the student-customer mentality in universities, the speaker shares their personal experience that faculty members have significant autonomy in teaching and grading, and students are responsible for taking advantage of the education they receive. While students pay for their education and put trust in their professors, they cannot be forced to learn. Lastly, the speaker ponders why books are often used as examples in discussions about the black hole information paradox, suggesting that the structure and materiality of the book itself may hold more information than its content.

    • Loebschmidt's reversibility paradox and the past hypothesisThe paradox of Loebschmidt challenges the second law of thermodynamics by suggesting that time-symmetric laws could lead to time-asymmetric behavior. The past hypothesis, which assumes the early universe started with low entropy, breaks the symmetry and resolves the paradox.

      The complete specification of an object's quantum state, including every atom and molecule, holds more information than the observable aspects of the object. However, the existence of information, such as the text on the pages of a book, is a more relatable concept for most people. In the context of thermodynamics, Loebschmidt's reversibility paradox challenged Boltzmann's explanation of the second law of thermodynamics. This paradox, also known as Loebschmidt's reversibility puzzle, highlights the issue of deriving time-asymmetric behavior from time-symmetric laws. The resolution to this paradox lies in the assumption of the past hypothesis, which posits that the early universe started with low entropy. This assumption breaks the symmetry and resolves the paradox. Regarding personal hobbies, the distinction between being agnostic and an atheist comes down to the level of confidence one has in the nonexistence of a god. Atheists express their belief that God does not exist with a degree of confidence, while agnostics acknowledge the possibility, however unlikely, of God's existence.

    • Evaluating the existence of God with scientific reasoningWe can use scientific methods to form credences about the existence of God, such as evaluating how well a theory fits the data and considering what we would expect the universe to look like if the theory were true.

      The existence of God and other big questions about the universe should not be treated differently than other questions when it comes to forming credences. While some agnostics argue that we cannot have evidence for or against the existence of God, the speaker believes that this is a mistaken approach. He suggests that we can use ordinary scientific reasoning, such as evaluating how well a theory fits the data and considering what we would expect the universe to look like if the theory were true, to form credences about the existence of God. The speaker also clarified that black holes do not suck everything in, but rather are regions of space-time with a strong gravitational pull from which you cannot escape. White holes, on the other hand, are purely hypothetical and do not exist in the real world. Additionally, the speaker discussed the concept that the information in a black hole is proportional to its surface area, and while this may seem indicative of a changing geometry of space-time, it does not necessarily mean that space is emergent.

    • Black holes and holographic principleBlack holes, as maximum entropy states, have an entropy proportional to their area, not volume, suggesting all their information resides on their horizon or a membrane (holographic principle)

      The concept of entropy being proportional to the area of a system, not its volume, is not surprising when considering ordinary condensed matter systems. However, when applied to black holes, which are supposed to be maximum entropy configurations, this idea leads to the hypothesis that all information in a black hole is on its horizon or can be thought of as living on a membrane, known as the holographic principle or black hole complementarity. The idea that the nature of a black hole depends on the observer's perspective is a key aspect of black hole complementarity. The discussion also touches upon the fact that a black hole is a maximum entropy state, yet it still has an entropy proportional to its area, not volume. These ideas are still speculative and have not been confirmed through experiments.

    • Understanding Reality: Black Holes, Decoherence, and the Second Law of ThermodynamicsBlack holes exist as quantum states, decoherence branches wave functions, and the second law of thermodynamics adds complexity to understanding these phenomena.

      The concept of changing geometries of spacetime in the universe is a complex and nuanced topic. Black holes, for instance, cannot be definitively described as three-dimensional or two-dimensional, but rather exist as quantum states that appear differently to various observers. Decoherence and the many worlds interpretation explain how macroscopic systems, like a cat, interact with their environments and branch the wave function, making it extremely difficult to avoid such interactions. The second law of thermodynamics also plays a role in many questions, as some answers may only be feasible in one direction of time. Ultimately, these concepts challenge our understanding of reality and require a nuanced approach to grasp their full implications. For those interested in lab-grown diamonds, Blunile.com offers beautiful and independently graded options, with a promo code of "audio" granting a discount on purchases over $500.

    • Black holes can increase their spin by matter falling inA tiny detection of light polarization rotation, known as cosmic birefringence, may provide evidence for theories violating Lorentz invariance or be a signature of dark energy, but detecting this effect is challenging due to potential contamination and its tiny size.

      While it's theoretically possible to slow down the spin of a black hole by throwing an object in the opposite direction, the more common phenomenon is that matter falling into a black hole, particularly in the form of an accretion disk, increases the black hole's spin. In the context of cosmic birefringence, a small detection of light polarization rotation has been made, but the effect is very tiny and difficult to detect due to potential contamination from foreground sources like our own galaxy. The detection is still there and may even be closer to 3 sigma than 2 sigma, but more data and analysis are needed to confirm the finding. The implications of cosmic birefringence could be significant, as it could provide evidence for theories that violate Lorentz invariance or be a signature of dark energy. However, the difficulty of detecting such a small effect makes it a challenging area of research.

    • Philosopher's perspective on physics and its challengesBoth philosophical inquiry and empirical research contribute to understanding fundamental laws of physics. The anthropic principle in cosmology and accounting for Earth's gravity in precision experiments are significant challenges.

      The pursuit of understanding the fundamental laws of physics involves both empirical research and philosophical inquiry. The philosopher's perspective may focus on the underlying ontology and implications of physical theories, while the typical physicist may focus on applying formulas to solve problems. However, both approaches share the same goal of understanding reality. One challenge the speaker encountered was the anthropic principle in cosmology, which he believes is not well understood or applied by physicists. Regarding the Large Hadron Collider experiments, the speaker noted that the gravity of individual particles is negligible, but the gravity of the Earth and other large objects is significant and must be accounted for in precision experiments. The speaker also emphasized the importance of valid reasoning when dealing with questions that cannot be observed or tested directly.

    • Potential Energy Doesn't Affect Spacetime Curvature Like Negative MassPotential energy is a relative concept in GR, not contributing to spacetime curvature, and empty space is stable

      The negative potential energy of planets in orbit, as well as that of electrons and atoms, does not contribute negatively to the curvature of spacetime in the same way as negative mass. Instead, potential energy is a relative concept, with two gravitating objects having more energy when they are farther apart due to weaker gravitational forces. In Einstein's equation of general relativity, the curvature of spacetime is sourced by the energy in matter and radiation, not the energy in spacetime itself. Empty space is stable in this framework, and gravitational waves, which are a form of spacetime disturbance, are more akin to harmonic oscillators with conserved energy. As for Christian nationalism in US politics, it's a complex issue with varying interpretations. Some view it as an expression of American values, while others see it as a threat to democracy due to potential conflicts of interest between religion and government. Ultimately, it's essential to consider the specific context and implications of this ideology in the political landscape.

    • Debating Political Labels and the Limits of UnderstandingSome argue for 'romantic nationalism' to describe prioritizing nation over individuals, while the limits of human understanding remain open-ended, and a lower vacuum energy can lead to a larger observable universe.

      There is ongoing debate about the labeling of certain political movements, with some arguing for terms like "romantic nationalism" to describe ideologies that prioritize nation over individuals and may pose threats to democracy. Another topic discussed was the limits of human understanding, with a mention of the distinction drawn between determinacy and randomness in science, but the question of whether there is anything beyond these concepts remaining open-ended. Lastly, a specific question from Humberto Nani about the relationship between vacuum energy and the maximum entropy a region of space can contain was addressed, explaining that a lower vacuum energy can lead to a larger observable universe due to the potential for a larger region of positive energy.

    • The role of vacuum energy in the universe's expansion and curvatureVacuum energy significantly impacts the universe's expansion rate and observable region, with higher energy leading to faster expansion and a smaller observable universe.

      The universe's vacuum energy plays a significant role in its expansion and curvature. De Sitter space, a solution to Einstein's equations with only positive vacuum energy, exhibits an expanding universe with a horizon beyond which light cannot reach. The higher the vacuum energy, the faster the universe expands, resulting in a smaller observable region and less entropy. In the realm of nuclear fusion, recent advancements have led to fusion occurring, but creating a pure fusion bomb is not feasible due to the enormous energy requirements and inefficiencies. Curiosity and discovery often stem from questioning established knowledge, such as Enrico Fermi's Fermi Paradox, which asks why we haven't encountered extraterrestrial civilizations given their supposed ubiquity. Lastly, a common misconception exists regarding the nature of quantum waves and their energy; quantum waves do carry energy and are not merely probability waves.

    • The Quantum World's Many BranchesThe many worlds interpretation proposes that the universe branches into numerous versions, distributing energy differently in each. Humans might detect a full photon's energy, but the universe could be spreading it across branches, making us part of a diluted wave function.

      The quantum world defies our classical understanding of energy and probability. The many worlds interpretation suggests that the universe branches into multiple versions, each with a different distribution of energy. Although we may detect a full photon's worth of energy, the universe as a whole might be distributing that energy across branches, making us part of the diluted wave function. Regarding animal and plant communication, it's unlikely that new discoveries will significantly change our definition of consciousness. Humans and other species share a common existence on Earth, but we also possess unique capacities that set us apart. Our understanding of consciousness continues to evolve as we explore various aspects of human thought and being. Lastly, there was no bonus recording with David Wallace, and the decision to create one was merely speculative.

    • Exploring Monetization and Audience EngagementCreators consider various monetization strategies, including bonus content for supporters and ad-free versions, while addressing audience preferences and skepticism towards grouping people into competitive and cooperative types. The discussion also clarified a common misconception about the clumpiness of dark matter.

      Creators like the one in this discussion are exploring different ways to monetize their content and engage with their audience. The current model involves a free version with ads, and a paid version without ads for supporters. The creator is considering offering additional bonus content for supporters, but is unsure if it would require too much extra work. They also pondered over the idea of having all versions be ad-free but keeping the same income, but suspect that fewer people would become supporters if there were no ads. The idea of grouping people into competitive and cooperative types was brought up, but the creator expressed skepticism about its accuracy and usefulness. A popular science misconception about the clumpiness of dark matter was also addressed, with the creator clarifying that the density of dark matter is actually higher now than it was in the past. Overall, the discussion highlights the complexities of monetizing content and the importance of understanding audience preferences.

    • Effective field theory's limitations in extreme conditionsEffective field theory fails to explain phenomena like black hole evaporation and quark behavior in extreme conditions, requiring new theories for a complete understanding.

      Effective field theory, which includes general relativity as an effective field theory along with the standard model, has its limitations. While it can make consistent predictions in regions where gravity is weak, it doesn't make sense to use it for phenomena like black hole evaporation, where the important part is understanding how information gets out of black holes. Furthermore, the idea that protons and neutrons would explode if the Higgs field turned off and quarks had zero mass is not straightforward. While most of the energy in a proton or neutron doesn't come from quark masses, there is a calculation to be done to determine if they could still form bound states. The discussion also touched on the idea that as technology advances and frontiers shift from exploration to the technological realm, there might be a loss of a certain sense of mystery and adventure. However, this is a subjective matter and not everyone may feel this loss.

    • The Instinct to Explore: Natural Human DriveScience and religion offer incompatible answers to understanding the fundamental nature of the universe, but the human instinct to explore continues to drive us forward, whether it's through technology, science, or spirituality, and offers endless opportunities for learning in unexplored frontiers.

      Exploration, whether it's physical or intellectual, is a natural human instinct that drives us to learn and discover new things. Just as animals follow instincts like migration, humans have spiritual and religious impulses. These can be studied scientifically without conflict, but when it comes to understanding the fundamental nature of the universe, science and religion offer incompatible answers. In sports, playing by the rules is expected, but in other areas of life, rebelling against the rules may be necessary. The spirit of exploration and discovery, whether it's through technology, science, or spirituality, continues to drive humanity forward. The unexplored frontiers of outer space, the bottom of the ocean, and the depths of our own knowledge offer endless opportunities for exploration and learning.

    • The Significance of Individual Players in BasketballIn basketball, having a top player is crucial for winning, but the incentives for losing to secure top draft picks create a complex issue.

      In basketball, unlike other sports like football, the impact of a single player is significant due to the smaller team size. Having one of the ten best players in the league is almost essential for winning the championship. Teams without these top players often try to become the worst to increase their chances of getting the best draft picks. However, this incentivizes losing games, which can be problematic. The NBA has attempted to change the lottery system to redistribute draft picks more evenly, but the incentives to be a bottom team remain. It's a complex issue with no easy solution, but embracing the rules of the game and recognizing the role of science and philosophy in fostering optimism and wonderment can help us navigate the challenges in various aspects of our lives.

    • Shifting gears and discovering mind-blowing conceptsEngaging in different activities helps us relax after work. Mind-blowing physics discoveries, like the accelerating universe and dark energy, remain mysteries. Quantum mechanics introduced a new paradigm and is incompletely understood. Environment is a complex concept with boundaries depending on the scale.

      It's essential to shift gears mentally after a long, stressful day by engaging in activities different from our everyday work. For the speaker, this means reading literature or watching basketball instead of science and philosophy podcasts. In the realm of physics discoveries, the most mind-blowing one for the speaker was the accelerating universe and the discovery of dark energy in 1998. This discovery was surprising and crucial, but it remains a mystery without a definitive explanation. Before the speaker was born, quantum mechanics emerged as a completely different paradigm from classical mechanics, which was mind-boggling and remains incompletely understood. Regarding the philosophical concept of environment, it's a tricky concept with boundaries that depend on the scale. In quantum mechanics, electrons in atoms are generally entangled with each other but not considered an environment because we can keep track of them. The environment is when we lose the ability to keep track of everything, such as the atoms in the air or the photons hitting the walls of a room. Improving our understanding of these concepts is crucial.

    • The Universe may contain brute facts that defy explanationSome features of the universe, like the existence of something rather than nothing or the impact of quantum measurements, might be unexplainable brute facts

      The nature of reality and the existence of certain phenomena may be unexplainable and could be considered brute facts. Brute facts are features of the universe that don't have a deeper cause or explanation. While it's important to keep looking for deeper explanations, we should also be open to the possibility that some things might just be brute facts. For instance, the question of why there is something rather than nothing is a profound question that might be a brute fact. Similarly, in the context of quantum mechanics, the existence of parallel universes and the impact of quantum measurements on the world around us might be brute facts. However, the likelihood of experiencing significant differences due to quantum measurements is uncertain and depends on the specifics of the situation. It's important to remember that in the multiverse, unlikely things can and do happen, but the probability of experiencing them is extremely low. Overall, the universe may contain many brute facts, but identifying them is a challenging task.

    • Microscopic differences and the macroscopic worldThe macroscopic world remains relatively unchanged despite microscopic differences due to the overwhelming probability of maintaining original properties, but the impact of these differences on observable effects is still an open question.

      Despite microscopic differences leading to significant changes at the atomic level, the macroscopic world, such as a box of gas, remains relatively unchanged. This is due to the overwhelming probability of the system maintaining its original properties from the macroscopic perspective. However, the question of whether these microscopic differences can amplify to macroscopic levels and lead to observable effects is still an open one, with the answer likely depending on various complex physics. For those starting their PhD journey, attending conferences is an excellent opportunity to learn and expand their horizons. While the focus should be on learning and engaging with the scientific community, it's essential not to put too much pressure on the conference experience, as outcomes can be unpredictable. Conferences offer a unique chance to connect with researchers from various backgrounds and gain valuable insights into different approaches and perspectives within the field. Regarding the application of renormalization groups in theoretical neuroscience and other complex systems, the relationship to the renormalization in fundamental physics is a complex one. While the methods share similarities, the context and applications differ significantly. A more comprehensive explanation of this relationship will be explored in an upcoming book.

    • Understanding the world at different scales through renormalization theoryRenormalization theory allows us to understand complex systems by focusing on their behavior at different scales, rather than point by point. It originated from quantum field theory and has applications in various fields including social sciences, economics, engineering, and chemistry.

      The concept of renormalization in quantum field theory emerged due to the calculation of infinite quantities in theories. Renormalizable theories require fixing a finite number of parameters to obtain finite answers, while nonrenormalizable theories require new input for each term, making predictions impossible. The shift in perspective came when Wilson and others considered renormalization in terms of energy and length scales, focusing on what happens below a certain scale and characterizing unknown quantities as renormalization constants. This insight can be applied to complex systems, including social sciences, economics, engineering, and chemistry. The fundamental idea of renormalization theory is to understand the world at different scales rather than point by point. While the original work by Feynman and Schwinger was a significant step towards this way of thinking, it's not necessary to read it to apply renormalization group ideas to neural systems since they are finite. Another interesting application of renormalization theory is the "no hair theorem" in black hole physics, which states that black holes essentially have no distinguishing features beyond their mass, charge, and angular momentum.

    • Understanding Human Behavior: Rationality is a Tool, Not a Fixed NormPeople's goals and motivations can lead to seemingly irrational behavior. Rationality is a tool for achieving goals, not a fixed norm or result.

      Rationality, as we understand it, is not always the best guide to understanding human behavior, especially when it comes to complex and seemingly irrational actions. Dutch Cheese's observation about the apparent inconsistency between younger and older people's behavior is a good example. While it may not be rational from a longevity perspective, it could be a strategy for increasing offspring. Rationality is a tool for achieving goals, not a fixed norm or result. People's goals can vary widely, and what seems irrational to one person might make perfect sense to another. It's important to be cautious when making assumptions about what is or isn't rational behavior and to consider the context and motivations behind people's actions. Additionally, the discussion touched on the analogy between gravity and electromagnetism, and the potential for generating gravitational forces in a similar way to how we generate electric and magnetic fields. However, while the analogy is close, there are significant differences, particularly in the ability to control and manipulate the fields, which makes the direct generation of gravitational forces a challenging prospect.

    • Black holes merging preserve their surface area and consciousness is continuousBlack holes maintain their surface area during mergers, and consciousness is a continuous aspect of beings, not limited to introspective moments.

      Black holes, when they collide, give off energy in the form of gravitational waves but do not decrease in total surface area. This means that the event horizon area, which some believe is proportional to the information contained within a black hole, does not diminish when two black holes merge. Regarding consciousness, the discussion explored the idea that consciousness is not limited to introspective moments but can also be experienced in simpler, automatic processes like smelling cinnamon. The speaker argued that consciousness is a continuous aspect of a being, even if one's attention to it comes and goes. In the realm of cooking, James Swift shared his preference for making pan pizza at home due to the significant return on investment, despite it not being the most complex dish he makes. Lastly, the argument from evolution against moral realism was discussed as a way to question moral absolutes and encourage philosophical inquiry for moral progress.

    • People invent moralities through social interaction and evolution, not discovering absolute moral principles.Moral realism's argument against objective moral truths doesn't negate the importance of invented moralities for survival and social interaction, but scientific methods are necessary for understanding complex systems.

      The argument against moral realism suggests that if there are no objective moral truths, people would still invent their own moral codes for survival and social interaction. These invented moralities may not align with supposed objective moral truths, and it's more realistic to believe that we invented moral morality through social interaction and evolution, rather than discovering absolute moral principles. Regarding complex systems, the development of a scientific method has been an antidote to simplistic narratives, but there's still a need for effective scientific methods to understand complex systems. While rules of thumb and heuristics can be helpful, they don't replace scientific principles. Complex systems require different kinds of analysis, and there's ongoing research to develop more effective methods for understanding them.

    • Exploring Complex Systems Through Storytelling and ImaginationStorytelling and imaginative thinking can inspire new perspectives and overlooked aspects in complex human systems and problem-solving.

      Storytelling and imaginative thinking can be effective methods for approaching complex human systems and problem-solving. While we may not have a definitive algorithm for generating good ideas, engaging in storytelling and fiction writing can inspire us to consider new perspectives and overlooked aspects. The complexity of human systems makes it challenging to establish hard and fast rules, making these more imaginative ways of thinking beneficial. Heikki Lokeni raises an intriguing question about the evolution of consciousness and theory of mind, asking whether we first attributed thoughts, desires, and intentions to others or ourselves. Although there is no definitive answer, the idea that we developed models of other people as agents first seems plausible. In the realm of physics, Aaron Munger discusses counterintuitive cases of growing entropy, such as oil and water separating or gas clumping into planets. Despite the apparent decrease in entropy in these cases, the total number of accessible states for the system is actually higher when the components are separated, making it a higher entropy state overall.

    • Exploring Complex Concepts: Prioritizing Impact and CollaborationResearchers prioritize projects with greatest impact, collaborate for knowledge growth, and aim to help listeners understand complex concepts despite varying levels of comprehension. Addressing root causes of incompetent politicians is more effective than competency tests.

      While researchers like Rad Antonov continue to explore complex concepts in their fields, they prioritize their time and energy on projects that have the most potential impact. Antonov mentioned his desire to collaborate with past guests on papers, but acknowledged the limitations of time and resources. Steve Wood raised the question of the intended audience for these complex discussions, with Antonov clarifying that the goal is to help listeners understand, even if at different levels. Gregory Kuznick brought up the idea of competency tests for older politicians, but Antonov argued against it, suggesting that addressing the root causes of why incompetent politicians remain in office would be a more effective solution. Overall, the conversation highlighted the importance of continued learning and exploration, even as researchers and listeners grapple with the challenges of understanding complex concepts.

    • Fragmentation in quantum mechanics research due to lack of unified terminologyThe lack of consensus on terminology in quantum mechanics research makes it difficult to find and connect relevant work, but continued dialogue and attention will likely lead to a more unified understanding and terminology.

      The lack of a unified terminology in the field of quantum mechanics, specifically regarding the issue of how Hilbert space is carved up into classical macroscopic objects or systems and environments, makes it challenging for researchers to find and connect relevant work. This fragmentation arises from the fact that while various terms, such as preferred basis, preferred decomposition, quantum factorization, and quantum rheology, all fall under the general umbrella of carving up quantum states, they point to slightly different physics questions. Additionally, this area of research has not yet gained significant attention or a cohesive community, leading to the invention of new terminology by individual researchers. The hope is that as more people become interested in this area and engage in dialogue, a consensus on terminology will emerge. The academic process relies on researchers writing and publishing papers, citing each other, and bringing attention to each other's work. The history of physics demonstrates that attention and popularization are crucial for the progression of ideas. Despite the current challenges, patience and continued dialogue will likely lead to a more unified understanding and terminology in this field.

    • Exploring the inverse problem in quantum mechanicsAs we delve deeper into quantum mechanics and quantum gravity, the need to clarify concepts and establish consistent terminology for dividing combined systems is likely to gain more attention.

      In the field of quantum mechanics, it's essential to have filters to determine what aspects to focus on. Historically, people have been content with the subdivisions of systems, such as electrons, and haven't felt the need to explore the inverse problem of dividing a combined system. However, as we continue to delve deeper into the foundations of quantum mechanics and quantum gravity, this issue is likely to gain more attention. As we progress, we will establish consistent terminology to clarify concepts. Remember, the early days of discoveries are never crystal clear and crisp, but the excitement and importance of the pursuit keep us moving forward. So, stay curious, keep pushing boundaries, and don't be afraid of the messy process. Thank you for joining this AMA, and we'll be back next week or month with more insights. Keep going!

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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!

    See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

    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/

    See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.