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    256 | Kelly and Zach Weinersmith on Building Cities on the Moon and Mars

    enNovember 13, 2023
    What are the benefits of using Indeed for hiring?
    How does Rocket Money assist with personal finance management?
    What are the challenges of establishing human settlements in space?
    Why is international cooperation important for space exploration projects?
    What human needs must be addressed for space settlements?

    Podcast Summary

    • Leverage specialized platforms for hiring and personal finance managementSpecialized platforms like Indeed for hiring and Rocket Money for personal finance management offer significant benefits, including high-quality matches, streamlined processes, and cost savings.

      When it comes to hiring or managing personal finances, the best solution isn't to search aimlessly but rather to leverage specialized platforms like Indeed for hiring and Rocket Money for personal finance management. Both platforms offer significant benefits: Indeed delivers high-quality matches for employers and helps streamline the hiring process, while Rocket Money helps users identify and cancel unwanted subscriptions and monitor spending. These tools can save time, money, and resources, enabling individuals and businesses to focus on their core objectives. Additionally, FedEx offers reliable and efficient delivery services, making it an essential partner for businesses. Overall, these tools and services represent game-changing solutions to common challenges in hiring, personal finance management, and logistics.

    • Discussions on the possibility of sex in spaceExperts estimate a low but non-zero probability of sex in space, possibly in less monitored Russian stations, due to human nature and the need for intimacy. Counterarguments suggest astronauts would share historic achievement.

      While there is no concrete evidence to confirm or deny if sex has occurred in space, given human nature and the likelihood of people finding ways to express intimacy, some experts estimate a low but non-zero probability. The discussion suggests that if it did happen, it might have occurred in less monitored Russian space stations due to fewer international collaborations and less perpetual monitoring. Additionally, the argument that astronauts might keep such secrets due to their career orientation was brought up. However, counterarguments suggest that the first person to have sex in space would likely share this historic achievement. Overall, the conversation highlights the complexities and intricacies of human behavior in extreme environments.

    • Setting up permanent human settlements on MarsTo establish permanent human settlements on Mars, we need to provide for basic needs, understand space conditions, and develop advanced technology for creating artificial environments, establishing local ecosystems, and addressing medical and reproductive needs.

      Establishing permanent human settlements in space, particularly on Mars, is a complex endeavor requiring careful consideration of various factors. These include providing for basic human needs, such as food, water, and shelter, as well as addressing challenges like radiation exposure and long-term health effects of reduced gravity. The process would likely involve initial research and understanding of how the human body responds to space conditions, followed by establishing a presence through short-term missions and eventually building self-sustaining communities. The steps to achieve this could include developing advanced technology for creating artificial environments, establishing local ecosystems, and addressing medical and reproductive needs. It's important to note that this is a long-term goal that would require significant resources and planning.

    • Setting up a space station near Earth with a manufacturing facilityDeveloping best practices for lunar soil ecosystem and on-site production, addressing legal aspects, and mastering living conditions on the moon before attempting Mars colonization

      Setting up a space station near Earth with a manufacturing facility could be more sensible than building large spacecrafts to travel directly to the moon or Mars. This approach would allow for the development of best practices for converting lunar soil into an ecosystem and learning how to build an on-site ecosystem to supply most consumables. It could also provide an opportunity to work out problems in reproduction and scale up living conditions on the moon before attempting to colonize Mars. An 80-person space station could serve as a trial run for larger colonies, and the legal aspects could be addressed as long as no ownership claims are made under the research stations. The ultimate goal would be to master living conditions on the moon and develop advanced rocket technology before attempting to colonize Mars. The moon could also potentially be funded through tourism. While the idea of a giant space station may seem daunting, historically, rendezvous has proven to be challenging, and certain things may be easier to do in zero gravity.

    • Exploring Space: Beyond Apollo's LimitsScaling up space exploration through reusable rockets, utilizing gravity, and focusing on resource-rich destinations like Mars are crucial for creating long-term, self-sustaining societies in space.

      While the Apollo missions were groundbreaking, they lacked the capability for long-term settlement due to the absence of rendezvous and the challenges of manufacturing in space. Instead, focusing on scaling up space exploration through reusable rockets like SpaceX's Starship could potentially eliminate the need for space stations and make space travel more affordable. Additionally, gravity, though an annoyance, is beneficial in various ways, including waste management and manufacturing. The moon, while closer and seemingly more appealing, lacks the resources necessary for a self-sustaining society compared to Mars, which has abundant water and carbon. While terraforming Mars to make its atmosphere breathable is an intriguing concept, it may be premature given our current understanding of the process and the geopolitical implications that come with it. In summary, the key takeaway is that scaling up space exploration, taking advantage of gravity, and focusing on resource-rich destinations like Mars are essential for establishing long-term, self-sustaining societies in space.

    • Exploring and terraforming Mars: Challenges and ethical dilemmasDespite potential benefits, Mars terraforming poses legal, ethical, and environmental concerns. Economics and current capabilities question long-term goals. Focus on self-sufficient settlements instead.

      The exploration and terraforming of Mars, despite its potential benefits like water and raw materials, presents significant challenges and ethical dilemmas. Terraforming Mars on a large scale, such as using comets or nuclear weapons, could be legally ambiguous, dangerous, and have severe environmental consequences. The economics of extracting valuable resources from Mars, like helium 3, are also questionable due to the harsh environment and the enormous amount of resources required. While Mars may have the necessary raw materials for human survival, the conditions on the planet are not pleasant and would require extensive modifications to make them habitable. The focus on long-term goals like terraforming Mars highlights the vast difference in prediction horizons between space enthusiasts and current capabilities. Instead, the near-term goal is to establish self-sufficient underground or enclosed settlements to survive on Mars.

    • Challenges of Establishing a Human Presence on MarsEstablishing a sustainable farm or colony on Mars requires addressing challenges like removing perchlorates, dealing with dust storms, understanding human reproduction in space, and building large shelters or going underground for radiation protection.

      Establishing a sustainable farm or human colony on Mars comes with significant challenges. These challenges include the need to remove perchlorates from the soil, dealing with dust storms, and understanding the impacts of gravity and space radiation on human reproduction. While some research has been done on rodents in space, we have yet to see a successful pregnancy, birth, and survival of offspring in space. The lack of understanding in these areas raises ethical concerns and questions about the feasibility of colonizing Mars. Additionally, the need for shielding from space radiation means that we may be looking at building large shelters or going underground, adding to the complexity and challenges of establishing a human presence on Mars.

    • Ethical concerns of building underground cities on the moon or MarsConsider potential costs and alternatives, such as Earth-based solutions or ocean cities, before building underground cities on the moon or Mars due to ethical concerns, including potential interplanetary warfare and resource scarcity increasing existential risk.

      The decision to build underground cities on the moon or Mars raises ethical concerns, particularly regarding gender and age, and the potential for interplanetary warfare increasing existential risk. While it may seem appealing to ensure the survival of the biosphere, it's important to consider the potential costs and alternatives, such as investing in Earth-based solutions or creating self-sustaining cities at the bottom of the ocean. The potential for interplanetary warfare and the scramble for limited resources on the moon add to the existential risk, making it a complex issue that requires careful consideration. Ultimately, the goal should be to minimize harm and maximize benefits for all involved.

    • Challenges in researching space psychology and human healthThe race to establish a permanent presence in space brings new risks and challenges, including lack of focus on research, backlog of experiments, and incentives for astronauts to hide health issues, requiring a systematic approach to ensure safety and success.

      The race between superpowers like China and the US to establish a permanent presence in space comes with new existential risks. And ironically, our efforts to eliminate existential risks could lead to new ones. For instance, the lack of systematic research on multigenerational animal reproduction in space is a concern if we're going to live there long-term. NASA, which started as a political act to beat the Soviets, is now dealing with a lack of focus and a backlog of experiments. Moreover, the incentives for astronauts to hide their mental and physical health issues make it difficult to rely on their self-reported data. These challenges make it hard to answer important questions about space psychology and human health in space. Therefore, a systematic approach to research is necessary to ensure the safety and success of long-term space exploration.

    • Deception and Adaptation in Space ExplorationDeception and adaptability have played a role in space exploration, but lying and hiding health conditions can have severe consequences. Long-term space travel might lead to unforeseen challenges, and humans may need to adapt to new environments, including Mars, where the long-term effects are unknown.

      Deception and adaptability have been prevalent in space exploration, from memorizing tests to lying about health conditions to potentially face height limits. However, the consequences of such actions can be severe, as seen when a cosmonaut's lie led to another crew member missing their opportunity to go to space. Regarding the physiological aspect, a baby born and raised on Mars or other planets with different gravitational forces might face challenges adapting back to Earth, as humans might not have the necessary adaptations for such environments. Additionally, there are unpredictable factors in space, such as the ability to eat in zero gravity, which was a surprise during the early space program. The first humans to visit Mars might be on a one-way trip due to the challenges of returning, but it is not the preferred option for most experts. The long-term effects of living in space for extended periods are still unknown, and it would be beneficial to learn more before leaving humans there permanently.

    • Private Mars Settlements and International LawThe establishment of private Mars settlements raises complex ethical and legal issues, including potential violations of international law and geopolitical tensions.

      While there's evidence that volunteers exist for one-way trips to Mars, the ethical and legal implications of private companies establishing settlements on Mars are complex. If a private company, like SpaceX, were to send a large group of people to Mars and leave them there, it would raise geopolitical concerns and potentially violate international law. The FAA and governments have some oversight, but private companies don't make these decisions completely on their own. International law, including treaties signed by the US, China, and Russia, could impact the consequences for a Mars settlement. The private company's origin country also matters, as it could lead to geopolitical tensions. The legal side of space exploration is an important aspect to consider, as treaties like the Outer Space Treaty of 1967 have been in place for a long time.

    • Outer Space Treaty of 1967 and its relevance to lunar land and resource exploitationThe Outer Space Treaty of 1967, which prohibits the appropriation of land on celestial bodies, leaves it unclear if extracting and selling resources falls under that category. Some advocate for a global commons approach to space resources, drawing inspiration from the Antarctic Treaty.

      The Outer Space Treaty of 1967, which governs the exploration and use of space, is still relevant today, despite ongoing debates about its applicability to lunar land and resource exploitation. The treaty prohibits the appropriation of land on celestial bodies, but it's unclear if extracting and selling resources falls under that category. Some countries argue for a global commons approach, where resources on the moon and other celestial bodies are shared among all nations. The Antarctic Treaty, which also established a commons, serves as a precedent. While some believe that the potential for profit in space will lead to disregard for international law, history shows that nations have consistently chosen to regulate newly accessible regions as commons. Ultimately, the future of space exploration and resource utilization will depend on international cooperation and consensus.

    • International Cooperation and the Creation of the Outer Space TreatyThe Outer Space Treaty of 1967 was established during the Cold War era to prevent countries from claiming ownership of celestial bodies and their resources, with principles including peaceful use and prohibition of weapons of mass destruction in space.

      The Outer Space Treaty of 1967 was created in a time of international cooperation and uncertainty, with the intention of preventing any one country from claiming ownership of celestial bodies or their resources. The treaty's vague language was deliberate, allowing for flexibility and adaptation to future developments. The treaty's creation was influenced by the Cold War era's fear of nuclear weapons testing in space and the increasing number of countries involved in space exploration. Despite its wide ratification, the treaty's applicability to current space exploration, particularly regarding private entities and resource exploitation, remains a topic of debate. The treaty's principles, such as the prohibition of weapons of mass destruction in space and the free use of space for peaceful purposes, continue to guide international space law.

    • Moon settlement as a new nation stateWhile international law may allow a moon settlement to secede under extreme circumstances, achieving self-sufficiency and independence from Earth is a significant challenge.

      While international law generally forbids the dismemberment of nations and the taking of property from the global commons, there is a possibility for a moon settlement to gain recognition as a new nation state if they are deeply oppressed. However, achieving self-sufficiency and independence from Earth is a significant challenge, requiring advancements in technology and a large population to support various specialized fields. The moon's potential secession would be uncharted territory, and the global community's response is uncertain. The discussion also touched upon the historical context of state creation and the concept of remedial secession, which grants a people the right to a particular territory under extreme circumstances.

    • Colonizing Mars: Massive Population and Advanced TechnologyEstablishing self-sufficient colonies on Mars or other planets requires advanced technology, massive populations, and innovative solutions to overcome resource limitations and harsh conditions.

      Establishing a self-sufficient colony on Mars or another planet will require a massive population and advanced technology, surpassing modern first-world standards. This was discussed in relation to historical attempts at communist autarky and the energy requirements for sustaining large populations. The cheapest and most efficient way to transport goods on Earth is by boat, and this needs to be factored into energy calculations for colonies. The desirable parts of potential colonies, such as the moon, have limited resources, and distribution may determine settlement size and location. Lava tubes, which offer protection from radiation, temperature swings, and the regolith, are an intriguing potential solution for setting up bases. However, even with these advancements, the challenges of colonizing other planets are significant and demand innovative solutions.

    • Learning from Biosphere 2: Challenges in Creating Self-Sustaining ColoniesBiosphere 2 experiment revealed the complexity of maintaining a closed ecosystem, importance of human psychology, and necessity for extensive research and preparation before establishing large-scale self-sustaining colonies. Starting with smaller, manageable systems and gradually scaling up is a potential solution.

      Creating self-sustaining colonies, like those envisioned for Mars, comes with significant challenges. The size and quality of essential resources, such as water and arable land, play a crucial role in the design and distribution of these colonies. The Biosphere 2 experiment, though flawed, offered valuable insights. It demonstrated the complexity of maintaining a closed ecosystem, the importance of human psychology, and the need for extensive research and preparation before attempting to establish large-scale colonies. The experience also highlighted the potential benefits of starting with smaller, more manageable systems and gradually scaling up. Despite its challenges, Biosphere 2 showed that with enough time, resources, and determination, it's possible to make progress towards creating closed-loop ecosystems.

    • Mars Colonists' Food Sources and Technological NeedsMars colonists may consume inefficient but diverse food sources like crickets or fungi, while technology, monitoring systems, and potentially nuclear power are crucial for survival. Space conflicts and technological challenges require international cooperation and creative solutions.

      The food supply for early Martian colonists could involve some level of inefficiency and openness to various dietary sources, such as crickets or fungus, to maintain psychological well-being and sanity. The conversion of energy to calories becomes less efficient as the animal size increases, making smaller food sources like crickets a more viable option. However, the use of technology for monitoring systems and potentially nuclear power will be essential for survival on Mars. Regarding space warfare, while weapons of mass destruction are prohibited, military operations are not explicitly addressed in the outer space treaty, leaving room for interpretation and potential conflicts. It's essential to avoid an arms race in space and maintain international cooperation. Additionally, challenges such as energy and cooling requirements for advanced technologies like computing facilities will need to be addressed creatively, potentially using underground resources or nuclear power.

    • Exploring Space: Costs, Concerns, and Potential RewardsDespite costs and concerns, the potential rewards of space exploration and colonization are vast, with advancements and scaling leading to more affordable access.

      While the cost of space exploration and colonization is significant and continues to decrease, the potential benefits and possibilities are vast. Russia and China have engaged in ASAT tests, raising concerns about space debris and potential international conflict. However, communication systems and the vastness of space mitigate some of these concerns. Nuclear reactors in space are currently in use and, despite being a concern for some, are not causing significant issues. As for the cost and timeline of colonizing the moon or Mars with a million people, it is uncertain but likely to be in the trillions. The decline in the cost of space travel since the 1950s suggests that continued advancements and scaling could lead to more affordable and accessible space exploration. Ultimately, the potential rewards of colonizing other planets and expanding human presence in space far outweigh the challenges.

    • Exploring Space: A Deliberate ApproachFocusing on biology experiments and international cooperation could lead to more beneficial space exploration in the long run, but rapid technology advancements and ethical considerations add complexity.

      The timeline for major space exploration projects, such as establishing self-sustaining settlements on other planets or the moon, is difficult to predict due to the uncertainties surrounding priorities, technological advancements, and ethical considerations. The speakers in this discussion argue that a more deliberate approach, with a focus on biology experiments and international cooperation, would be more beneficial in the long run. However, the rapid advancement of technology could potentially change the picture, allowing for faster progress. Additionally, the potential risks and ethical dilemmas that come with advanced AI and robotics in space add another layer of complexity to the issue. Ultimately, the speakers suggest that a human-centered approach, where we build and explore as people rather than relying on robots and AI, may be more plausible and desirable.

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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

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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

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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/

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

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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

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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

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

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    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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    281 | Samir Okasha on the Philosophy of Agency and Evolution

    281 | Samir Okasha on the Philosophy of Agency and Evolution

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    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2024/07/01/281-samir-okasha-on-the-philosophy-of-agency-and-evolution/

    Samir Okasha received his D.Phil. in Philosophy from the University of Oxford. He is currently Professor of the Philosophy of Science at the University of Bristol. He is a winner of the Lakatos Award for his book Evolution and the Levels of Selection, and is a Fellow of the British Academy.


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    248 | Yejin Choi on AI and Common Sense

    248 | Yejin Choi on AI and Common Sense

    Over the last year, AI large-language models (LLMs) like ChatGPT have demonstrated a remarkable ability to carry on human-like conversations in a variety of different concepts. But the way these LLMs "learn" is very different from how human beings learn, and the same can be said for how they "reason." It's reasonable to ask, do these AI programs really understand the world they are talking about? Do they possess a common-sense picture of reality, or can they just string together words in convincing ways without any underlying understanding? Computer scientist Yejin Choi is a leader in trying to understand the sense in which AIs are actually intelligent, and why in some ways they're still shockingly stupid.

    Blog post with transcript: https://www.preposterousuniverse.com/podcast/2023/08/28/248-yejin-choi-on-ai-and-common-sense/

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    Yejin Choi received a Ph.D. in computer science from Cornell University. She is currently the Wissner-Slivka Professor at the Paul G. Allen School of Computer Science & Engineering at the University of Washington and also a senior research director at AI2 overseeing the project Mosaic. Among her awards are a MacArthur fellowship and a fellow of the Association for Computational Linguistics.


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    216 | John Allen Paulos on Numbers, Narratives, and Numeracy

    216 | John Allen Paulos on Numbers, Narratives, and Numeracy

    People have a complicated relationship to mathematics. We all use it in our everyday lives, from calculating a tip at a restaurant to estimating the probability of some future event. But many people find the subject intimidating, if not off-putting. John Allen Paulos has long been working to make mathematics more approachable and encourage people to become more numerate. We talk about how people think about math, what kinds of math they should know, and the role of stories and narrative to make math come alive. 

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    John Allen Paulos received his Ph.D. in mathematics from the University of Wisconsin, Madison. He is currently a professor of mathematics at Temple University. He s a bestselling author, and frequent contributor to publications such as ABCNews.com, the Guardian, and Scientific American. Among his awards are the Science Communication award from the American Association for the Advancement of Science and the Mathematics Communication Award from the Joint Policy Board of Mathematics. His new book is Who’s Counting? Uniting Numbers and Narratives with Stories from Pop Culture, Puzzles, Politics, and More.


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    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.