Brain in a Vat

Brain in a Vat
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Mar 22, 2026 • 1h 2min

Free Speech, Hate Speech, and Mental Health | Chloe Carmichael

Clinical psychologist Chloe Carmichael, author of "Can I Say That?," examines how free expression relates to psychological well-being and social trust. Carmichael argues that suppressing disagreement drives resentment and misperception, rather than resolving conflict. She also scrutinizes the role of safe spaces, the spread of therapeutic language, and what limits on speech might be justified in public versus private life.[00:00] Introduction to Chloe Carmichael[00:29] Mark’s Workplace Story[02:33] Repression and Mental Health [09:47] Reeducation versus dialogue [13:58] Campus safe spaces[21:30] Public speech[22:37] Therapy language and groupthink [27:34] Academia echo chambers [33:12] First Amendment Limits [43:16] Cultural Social Norms [56:44] Why Censorship Backfires [01:00:25] Five Ds and Violence [01:01:52] Closing RemarksRead Carmichael's book, "Can I Say That?: Why Free Speech Matters and How to Use It Fearlessly," here: https://www.amazon.com/Can-Say-That-Matters-Fearlessly/dp/151078490XSubscribe on Substack: https://braininavat.substack.com/
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Mar 9, 2026 • 1h 9min

The Bias against Conservatism in Higher Education | Amy Wax

Amy Wax joins us to discuss the ideological landscape of higher education. Wax reflects on her conflict with the University of Pennsylvania and argues that universities have become increasingly hostile to conservative viewpoints. The conversation explores ideological bias on campus, academic freedom, and the challenges conservatives face within modern higher education.[00:00] Welcome to the Discussion[00:23] Amy Wax and Penn Suspension[07:01] Lawsuit and Double Standards[15:01] Speech Versus Action Rules[25:33] Why Academia Stays One Sided[35:29] Classroom Power Imbalance[40:14] Public Private Speech Rules[44:18] Feminization And Wokeness[50:58] Facts Versus Ideology[53:47] COVID And Contested Facts[58:06] Race IQ And Censorship[01:02:06] Equity Meritocracy Clash[01:08:27] Closing Comments
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Feb 22, 2026 • 1h 5min

The Nature of the Sexes | Tomás Bogardus (with Stephen Kershnar)

Tomás Bogardus joins to discuss his book "The Nature of the Sexes" and argues for a reproductive-functional account of biological sex. According to Bogardus, males and females are defined by the reproductive function their bodies are structured to perform: producing sperm or eggs. Even when that function is not realized and no sperm or eggs are produced, a person’s sex remains the same, because it is grounded in biological organization. To defend this view, Bogardus considers intersex and DSD cases, critiques contextualist accounts that treat sex as domain-dependent, and argues for a unified meaning of “male” and “female.” The conversation later turns to whether sex is essential or changeable, as well as debates about pronouns, sports, and medical interventions for minors.[00:00] Introduction to the Debate on Sex[00:23] The Delivery Room Thought Experiment: "It’s a Boy/Girl"[02:04] Sex as Reproductive Function[07:41 ]Gametes, Competitor Theories, and the Non-Producers Objection[11:29] Intersex & DSD Cases[19:23] Contextualism and Cluster Concepts: Sex in Sports, Bathrooms, Dating?[26:23] Conjunction Reduction & Animal Examples: Rooster vs Crocodile[30:24] One Unified Meaning of Sex Terms[32:06] Are ‘Man’ and ‘Woman’ Social Roles or Biological Sexes?[37:15] Is Sex Essential or Contingent? Souls, Brains, and Hylomorphism[42:23] Surgery and Embryo Gene Editing[47:15] Fairness in Sports/Prisons[54:38] Should Gender-Affirming Medical Care for Minors Be Criminalized?[01:04:09] ConclusionRead "The Nature of the Sexes: Why Biology Matters": https://www.routledge.com/The-Nature-of-the-Sexes-Why-Biology-Matters/Bogardus/p/book/9781041029533Subscribe to the Brain in a Vat Substack: https://braininavat.substack.com/
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Feb 9, 2026 • 1h 5min

God Is Not Praiseworthy | Stephen Kershnar and Nathan Bray

Brain in a Vat is back from hiatus with a deep dive into the philosophy of religion. Stephen Kershnar and Nathan Bray join us to ask whether God can be morally responsible and whether worship makes sense if God could not have done otherwise.The discussion begins with a thought experiment about gratitude and worship. If worship expresses praise for morally responsible action, can a perfectly good God deserve it at all? Kershnar and Bray argue that divine perfection may undermine responsibility rather than secure it.From there, Kershnar and Bray explore compulsion, omnibenevolence, and free will. Along the way, we discuss moral saints, chess computers, Frankfurt-style cases, Patty Hearst, and the costs these arguments impose on traditional theism. We would love to hear your thoughts. Is worship grounded in gratitude, awe, or something else entirely? And does God need moral responsibility to be worthy of it?[00:00] Welcome Back to Brain in a Vat [00:45] Thought Experiment: Worship and Gratitude [02:59] The Compulsion Argument[05:04] The Role of Awe in Worship [13:21] Maximizing Goodness and Divine Discretion [20:26] The Problem of Evil and Divine Psychology [33:33] Exploring Patty Hearst's Psychology [40:19] The Nature of God's Perfection [46:57] Philosophical Debates on God's Existence[01:03:49] Concluding Thoughts and Viewer Engagement
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Nov 9, 2025 • 1h 1min

Facial Distortions and Prosopometamorphopsia | Brad Duchaine (Rebroadcast)

In this engaging discussion, cognitive neuroscientist Brad Duchaine from Dartmouth explores the intriguing realm of prosopometamorphopsia (PMO), a condition causing people to see face distortions like demons or dragons. He contrasts PMO with prosopagnosia, shedding light on how their manifestations differ. Brad delves into the neurological underpinnings and social impacts of these disorders, revealing challenges in relationships and daily life. Additionally, he discusses potential management techniques that may help individuals cope with their unique visual experiences.
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Nov 2, 2025 • 56min

Should We Stay or Should We Go | Lionel Shriver (Rebroadcast)

When is death preferable to living? Are there fates worse than death? And what sort of future society should we build?Lionel Shriver discusses her latest novel, Should We Stay or Should We Go.
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Oct 26, 2025 • 1h 2min

Parental Licensing | Connor Kianpour (Rebroadcast)

Should you be required to get a parental license from the State before you can raise your own children? Do the wishes of parents matter at all – or should we only care about the best interests of their children?
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Oct 17, 2025 • 52min

Can AI Bring Our Loved Ones Back? Inside Reflekta AI’s Digital Afterlife | Miles Spencer

In this special episode of Brain in a Vat, we step outside our usual format to interview Miles Spencer, founder of Reflekta — a company using cutting-edge AI to recreate digital reflections of loved ones who’ve passed away.Miles shares his personal journey of using Reflekta to reconnect with his late father and explains how the system blends voice recordings, photos, and written biographies to create realistic digital personas. The discussion covers the emotional impact, ethical questions, and philosophical issues raised by this technology, from preserving family memories to reviving historical or fictional figures.We also consider what it means to build a living legacy in the age of AI, and how this might change the way we understand grief, identity, and memory.Chapters:[00:00] Introduction[00:15] Meet Miles Spencer, Founder of Reflector AI[03:07] How the Technology Works[07:12] Philosophical Implications of Digital Afterlife[15:29] Living Legacies and Ethical Boundaries[23:12] Historical and Public Figures[26:33] Family, Memory, and AI Elders[33:17] Reflections on “The Rehearsal” and Reality[42:31] Future Implications[47:54] Legacy, Spirit, and the Human Story[51:21] Closing Thoughts
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Sep 30, 2025 • 52min

Cultural Appropriation | Stephen Kershnar (Rebroadcast)

In this thought-provoking discussion, philosopher Stephen Kershnar challenges the conventional view of cultural appropriation. He argues that appropriation can be permissible and even beneficial, enhancing market efficiency and cultural exchange. Through intriguing thought experiments involving burrito carts and prom dresses, Kershnar debates whether cultural practices can be owned and explores the ethics surrounding potentially sacred symbols. The conversation takes a turn as they assess the balance between respecting cultural significance and the freedom of expression.
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Sep 22, 2025 • 58min

Aztec Philosophy: What the Aztecs Knew About Life | Sebastian Purcell

How did the Aztecs understand life, morality, and human purpose? What can Aztec philosophy teach us about living well? Sebastian Purcell guides us through Aztec thought, beginning with a thought experiment from Homer’s Odyssey and moving into the core ideas of Aztec wisdom. Along the way, he contrasts Aztec ethics with Western traditions and applies them to modern debates on morality, from sex and meat consumption to life’s ultimate purpose. The conversation also takes on difficult topics like human sacrifice and sexual norms, showing how Aztec thought continues to challenge and enrich philosophy today.Chapters:[00:32] Odysseus and the Genie: A Thought Experiment[04:40] The Concept of Rootedness[08:17] Aztec Obligations and the Good Life[19:12] Shared Agency and Virtue[27:51] The Challenge of Community Bubbles[28:58] Aztec Views on Community and Travel[32:44] Human Sacrifice: Myth or Reality?[48:51] Aztec Moral Framework and Applied Ethics[53:03] Sexual Ethics in Aztec Society[57:06] Conclusion and Final Thoughts

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