ToKCast

150 episodes listed below

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Philosophy with technical consequences.

The gist

ToKCast follows a single analytical voice through dense questions about knowledge, explanation, science, and public life. Recent episodes move from David Deutsch and Karl Popper to LLMs, Michael Levin, social media bans, and responses to political violence in Australia.

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About ToKCast

ToKCast is a long-form philosophy and science commentary show centered on knowledge, explanation, and the standards by which claims should be judged. Its recent run moves across epistemology, artificial intelligence, biology, computation, and Australian politics, but the governing concern stays consistent. What counts as an explanation? What is merely a metaphor? Where does a category mistake hide inside attractive language? The show returns often to David Deutsch, Karl Popper, and the philosophy of science, especially through close treatment of The Fabric of Reality and debates over Popperian versus Kuhnian accounts of scientific progress. It is not casual chat. Episodes tend to build through definitions, objections, clarifications, and extended examples, with a style that rewards listeners who like intellectual patience. A discussion of belief becomes an argument about knowledge, fallibility, causal power, books, telescopes, genes, and why information changes physical reality. A discussion of LLMs becomes a test of whether Bayesian reasoning explains transformer performance or simply names a pattern inside a closed system. The Michael Levin reaction series is especially characteristic. The show acknowledges the fascination of regeneration, bioelectricity, active matter, and basal cognition, then pushes hard against blurred claims about consciousness, algorithms, and what cells or flatworms can meaningfully be said to know. It is sharpest when language gets slippery. Algorithms, cognition, intelligence, belief, and science are treated as words that need disciplined handling before they can do real explanatory work. Political episodes use the same skeptical posture in a more combative register, especially around Australian social media restrictions, Anthony Albanese, hate speech law, and official responses after the Bondi attack. Those episodes are more confrontational and less abstract, but still framed around reasoning, responsibility, and the consequences of vague categories. ToKCast is best understood as a demanding editorial monologue for listeners who enjoy philosophy that stays in contact with AI, physics, biology, and public argument. It is dense. It is exacting. It expects the listener to follow distinctions rather than settle for vibes.

Made for: ToKCast is for listeners who enjoy rigorous solo analysis of epistemology, AI, physics, biology, and political argument. It especially suits people who want definitions tested carefully before accepting fashionable claims.

What sets it apart: The show’s edge is its insistence on explanation as the standard, not novelty, prestige, or rhetorical force. It can move from general relativity to LLMs to Australian legislation while keeping the same pressure on categories and causal claims.

In their own words

This is a podcast primarily about the work of philosopher and physicist David Deutsch and related matters (such as Popperian epistemology). I read from and comment upon the books ”The Beginning of Infinity” & ”The Fabric of Reality” (both by Deutsch), ”The Science of Can & Can’t” (by Deutsch’s collegue Marletto) and ”Rationality” by Pinker (so far). In addition I make stand alone episodes about topics like resources, environmentalism, economics, science, philosophy, epistemology (especially explanations) and reason broadly.

As heard by us

Based on 6 episodes we listened to · September 2026

ToKCast tests political and technological claims by tracing their definitions, assumptions and explanatory limits.

ToKCast takes claims apart slowly, testing their definitions, assumptions and consequences before accepting the argument on offer. The solo format moves between political commentary and philosophy, with episodes addressing Australia's social media restrictions and the…

Read our full review in PlayNext →

Why you'd press play

A flatworm cannot run a podcast, and you would like the categorical distinction properly defended.

Press play if you want

  • someone to test Bayesian accounts of LLMs against a demand for genuine explanation
  • a careful boundary drawn between cellular cognition and the knowledge people create
Read the full recommendation in PlayNext →
Popperian epistemologyDavid Deutsch and The Fabric of Realityknowledge and beliefLLMs and Bayesian reasoningMichael Levin and bioelectricityalgorithms and computationAustralian social media lawhate speech and political response

Talks about

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Episodes

  1. 1

    Ep 240: AI 2027 Reaction Part 4

    A discussion of the geopolitical implications of superintelligence in 2027, comparing current AI fears to past sci-fi scenarios like Terminator and The Matrix.

    ·22m
  2. 2

    Ep 259: Reaction to Michael Levin Part 3: Bait and Switch, Podcastistan and Surprising(?) algorithms.

    ·1h
  3. 3

    Ep 258: Reaction to Michael Levin, Part 2: Bioelectricity, Consciousness and Knowing

    ·1h 39m
  4. 4

    Ep 257: Reaction to Michael Levin, Part 1: Categories and Continuums.

    ·1h 8m
  5. 5

    Ep 256: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands” Part 2

    ·1h 10m
  6. 6

    Ep 255: Does this research explain how LLMs work?

    ·1h 23m
  7. 7

    Ep 254: Australia: The Land of Bans. (Social Media prohibited for under-16s. Analysis of the arguments "for".)

    ·1h 33m
  8. 8

    Ep 253: Further Comments on the Bondi Massacre.

    ·35m
  9. 9

    Ep 252: Response to the Prime Minister of Australia

    ·1h 5m
  10. 10

    Ep 210: Livestream - Question, Answer and repeat for 2+ hours

    ·2h 15m
  11. 11

    Ep 209: Rational Decision Making

    ·1h 3m
  12. 12

    Ep 208: David Deutsch’s ”The Fabric of Reality” Chapter 11 ”Time: The First Quantum Concept” Part 3

    ·39m
  13. 13

    Ep 207: Variations on a Conjecture

    ·27m
  14. 14

    Ep 206: Sam Kuypers (Time: The First Quantum Concept Part 3 - and more).

    ·1h 46m
  15. 15

    Ep 204: David Deutsch’s ”The Fabric of Reality” Chapter 11 ”Time: The First Quantum Concept” Part 1

    ·1h
  16. 16

    Ep 203: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 4

    ·1h 17m
  17. 17

    Ep 181: The Big Bang Livestream ToKCast

    ·1h 17m
  18. 18

    Ep 180: Livestream: ”The Open Hand of Reason”

    ·2h 10m
  19. 19

    Ep 251: OK Doomer!

    ·31m
  20. 20

    Ep 250: The Farthest Reaches - Audiobook

    ·4h 19m
  21. 21

    Ep 249: The Farthest Reaches Part 4 and Conclusion

    ·1h 12m
  22. 22

    Ep 248: AI and Philosophy of Science

    ·1h 26m
  23. 23

    Ep 247: The Farthest Reaches Part 3

    ·47m
  24. 24

    Ep 246: The Farthest Reaches Part 2

    ·56m
  25. 25

    Ep 245: The Farthest Reaches (Part 1)

    ·45m
  26. 26

    Ep 244: Deep learning is not "inductive".

    ·23m
  27. 27

    Ep 243: In praise of ignorance - the podcast. With Liberty Fitz-Claridge

    ·1h 36m
  28. 28

    Ep 242: Is religion worth preserving?

    ·18m
  29. 29

    Ep 239: AI 2027 Reaction Part 3

    ·46m
  30. 30

    Ep 238: AI 2027 Reaction Part 2

    ·48m
  31. 31

    Ep 237: AI 2027 Reaction. Part 1

    ·53m
  32. 32

    Ep 236: Max Velthoven, legal science, AI and epistemology.

    ·1h 10m
  33. 33

    Ep 235: The Simulation Hypothesis

    ·1h 50m
  34. 34

    Ep 234: On the Evolution of Reason

    ·43m
  35. 35

    Ep 233: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands" Part 1

    ·1h 11m
  36. 36

    Ep 232: Karl Popper's "The Myth of the Framework" Sections IV to VI. "The Critical Method": deep dive

    ·1h 23m
  37. 37

    Ep 260: I don't believe it!

    ·1h 7m
  38. 38

    Ep 231: Karl Popper's "The Myth of the Framework" Sections I to III. Discussing discussions: deep dive

    ·1h 36m
  39. 39

    Ep 230: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”Time Travel” Part 3

    ·1h 33m
  40. 40

    Ep 229: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 2

    ·53m
  41. 41

    Ep 228: Knowledge Beyond Belief

    ·56m
  42. 42

    Ep 227: "What is Capitalism?" - an encounter between Objectivism and Critical Rationalism.

    ·1h 51m
  43. 43

    Ep 226: Realism and the purposes of philosophy.

    ·2h 17m
  44. 44

    Ep 225: Livestream from November 27, 2024

    ·1h 56m
  45. 45

    Ep 224: Shapes, Time, and Holism - by Julian Barbour

    ·1h 54m
  46. 46

    Ep 223: The Deutsch Files IV (ToKCast version)

    ·1h 28m
  47. 47

    Ep 222: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 1

    ·51m
  48. 48

    Ep 221: Do Not Destroy The Means of Error Correction

    ·26m
  49. 49

    Ep 220: Criticism is never enough

    ·39m
  50. 50

    Ep 219: Response to Peter Boghossian Part 3, Appendix

    ·24m
  51. 51

    Ep 218: Peter Boghossian Response PART 2

    ·1h 3m
  52. 52

    Ep: 217 Peter Boghossian Response Part 1

    ·1h 17m
  53. 53

    Ep 216: Astrobiology and Cancer

    ·1h 24m
  54. 54

    Ep 215: Charley Lineweaver

    ·1h 20m
  55. 55

    Ep 212: Livestream 3, June 28 2024

    ·2h 25m
  56. 56

    Ep 211: Livestream 2, June 26 2024

    ·1h 18m
  57. 57

    Ep 202: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 3

    ·45m
  58. 58

    Ep 201: Progress: Conserving the means of Error Correction. Free Speech, Free Trade and Democracy.

    ·43m
  59. 59

    Ep 200: Chiara Marletto

    ·1h 28m
  60. 60

    Ep 199: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 2

    ·50m
  61. 61

    Ep 198: Bayesianism

    ·1h 36m
  62. 62

    Ep 197: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 1: Introduction

    ·1h 25m
  63. 63

    Ep 196: The Mother Military

    ·43m
  64. 64

    Ep 195: Knowledge, Wealth and Constructors

    ·35m
  65. 65

    Ep 194: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part 4: Shor’s Algorithm

    ·1h 34m
  66. 66

    Ep 193: Effortless Stoicism

    ·26m
  67. 67

    Ep 192: Where do ideas come from?

    ·1h 3m
  68. 68

    Ep 191: Science News 2: Dark Matter, Fusion, JWST Latest

    ·39m
  69. 69

    Ep 190: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part3

    ·35m
  70. 70

    Ep 189: Epiphenomena

    ·18m
  71. 71

    Ep 188: Nick Bostrom on AI on ”Talk TV” - analysis

    ·41m
  72. 72

    Ep 187: Red Pens and Fallibilism

    ·24m
  73. 73

    Ep 186: Brett, Naval and more on AI & AGI

    ·1h 34m
  74. 74

    Ep 185: Possibility and Actuality. Facts and Counterfactuals.

    ·1h 1m
  75. 75

    Ep 184: ToKCast Digest - An Overview of Optimism

    ·1h 21m
  76. 76

    Ep 183: St George in retirement syndrome on St Patrick’s day.

    ·1h 2m
  77. 77

    Ep 182: Livestream Science News and AMA

    ·1h 3m
  78. 78

    Ep 179: Livestream March 14, 2023

    ·1h 35m
  79. 79

    Ep 178: Its, Bits, Qubits *Part 2*

    ·51m
  80. 80

    Ep 177: Its, Bits, Qubits. Part 1

    ·1h 5m
  81. 81

    Ep 176: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part 2

    ·1h 1m
  82. 82

    Ep 175: Science News 1: Population III - The First Generation of Stars in the Universe Observed?

    ·58m
  83. 83

    Ep 174: A message for next millennium.

    ·29m
  84. 84

    Ep 173: Brett Talks Twitter 2

    ·49m
  85. 85

    Ep 172: Talents and Testing

    ·12m
  86. 86

    Ep 171: Knowledge and Ignorance 6

    ·1h 14m
  87. 87

    Ep 170: Are creativity and consciousness the same thing?

    ·18m
  88. 88

    Ep 169: Livestream & Happy New Year

    ·2h 13m
  89. 89

    Ep 168: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part 1

    ·1h 16m
  90. 90

    Ep 167: ”Degrowth” - the plan for civilisational decline and disaster.

    ·1h 33m
  91. 91

    Ep 166: Newsletter 18: A weekend of Twitter

    ·2h 20m
  92. 92

    Ep 165: Knowledge and Ignorance Part 5

    ·52m
  93. 93

    Ep 164: Knowledge and Ignorance Part4

    ·46m
  94. 94

    Ep 163: David Deutsch’s ”The Fabric of Reality” Chapter 8 ”The Significance of Life” Part 2

    ·1h 11m
  95. 95

    Ep 162: Steven Pinker’s ”Rationality” Chapter 7 ”Hits and False Alarms” Part 1

    ·57m
  96. 96

    Ep 161: David Deutsch’s ”The Fabric of Reality” Chapter 8 ”The Significance of Life”.

    ·56m
  97. 97

    Ep 205: David Deutsch’s ”The Fabric of Reality” Chapter 11 ”Time: The First Quantum Concept” *Part 2*

    This episode discusses David Deutsch's argument that time is not a framework but an object, and the flow of time is an illusion.

    ·53m
  98. 98

    Ep 241: AI 2027 Reaction Part 5: Summary and Conclusions

    The host concludes a series on the AI 2027 paper, arguing that current AI systems like LLMs are not on a path to becoming conscious persons and that the debate is hindered by differing definitions of intelligence and personhood.

    ·42m
  99. 99

    Ep 213: ToKCast in Auckland - live

    Bret Hall gives a live talk in Auckland about decision making, crediting David Deutsch and Karl Popper, at the Naturalistic Decision-Making Association conference.

    ·1h 9m
  100. 100

    Ep 214: Resources, Wealth, Technology, Error Correction and Knowledge Creation

    This episode explores the logical connections between resources, wealth, technology, error correction, and knowledge creation, arguing that error correction is key to knowledge creation and wealth generation.

    ·1h 27m
  101. 101

    Ep 260: I don't believe it!

    Hidden gem

    The host discusses whether the concept of belief is necessary in epistemology, arguing against it while referencing Karl Popper and a conversation with philosopher Peter Bakozian.

    Apr 5, 2026·1h 7m·2 clips
  102. 102

    Ep 259: Reaction to Michael Levin Part 3: Bait and Switch, Podcastistan and Surprising(?) algorithms.

    Hidden gem

    The host reacts to Michael Levin's claims on Tim Ferriss' podcast, focusing on Levin's unconventional view that algorithms exhibit mysterious behavior akin to consciousness.

    Mar 11, 2026·1h·2 clips
  103. 103

    Ep 258: Reaction to Michael Levin, Part 2: Bioelectricity, Consciousness and Knowing

    ToKCast examines Michael Levin's bioelectricity research, including flatworms whose electrical patterns can be changed so they regrow two heads without altered genetics.

    Feb 16, 2026·1h 39m·5 clips
  104. 104

    Ep 257: Reaction to Michael Levin, Part 1: Categories and Continuums.

    The host reacts to Michael Levin's interviews, discussing his work on regeneration and implications for longevity and cancer research.

    Feb 9, 2026·1h 8m
  105. 105

    Ep 256: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands” Part 2

    This episode continues a commentary on David Deutsch's chapter 'The Four Strands', applying Popperian and Kuhnian accounts of science to quantum theory.

    Jan 30, 2026·1h 10m
  106. 106

    Ep 255: Does this research explain how LLMs work?

    Hidden gem

    ToKCast episode 255 asks whether a trilogy of papers can explain how LLMs like Grok, ChatGPT, Claude, and Gemini work inside the transformer black box.

    Jan 14, 2026·1h 23m·5 clips
  107. 107

    Ep 254: Australia: The Land of Bans. (Social Media prohibited for under-16s. Analysis of the arguments "for".)

    Hidden gem

    TopCast Ep 254 ties Australia's under-16 social-media ban to the Bondi tragedy and treats both as tests of government reasoning.

    Dec 25, 2025·1h 33m·5 clips
  108. 108

    Ep 253: Further Comments on the Bondi Massacre.

    ToKCast's Ep 253, "Further Comments on the Bondi Massacre," argues that Australia is answering Bondi with broader hate-speech laws while still avoiding the words "Islamist extremism." The speaker says Anthony Albanese's government should have focused on police presence, intelligence, and security around Bondi Beach instead of only "new legal territory" and "lowering thresholds." The episode pivots to education, where the government backs teacher training, UNESCO support, and a David Gonski task force to counter anti-Semitism in schools and universities.

    Dec 22, 2025·35m·2 clips
  109. 109

    Ep 252: Response to the Prime Minister of Australia

    Dec 19, 2025·1h 5m
  110. 110

    Ep 251: OK Doomer!

    Dec 11, 2025·31m
  111. 111

    Ep 250: The Farthest Reaches - Audiobook

    Nov 12, 2025·4h 19m
  112. 112

    Ep 249: The Farthest Reaches Part 4 and Conclusion

    Oct 17, 2025·1h 12m
  113. 113

    Ep 248: AI and Philosophy of Science

    Oct 13, 2025·1h 26m
  114. 114

    Ep 247: The Farthest Reaches Part 3

    Sep 22, 2025·47m
  115. 115

    Ep 246: The Farthest Reaches Part 2

    Sep 16, 2025·56m
  116. 116

    Ep 245: The Farthest Reaches (Part 1)

    Sep 12, 2025·45m
  117. 117

    Ep 244: Deep learning is not "inductive".

    Aug 22, 2025·23m
  118. 118

    Ep 243: In praise of ignorance - the podcast. With Liberty Fitz-Claridge

    Jul 21, 2025·1h 36m
  119. 119

    Ep 242: Is religion worth preserving?

    Jul 11, 2025·18m
  120. 120

    Ep 241: AI 2027 Reaction Part 5: Summary and Conclusions

    May 29, 2025·42m
  121. 121

    Ep 240: AI 2027 Reaction Part 4

    May 22, 2025·22m
  122. 122

    Ep 239: AI 2027 Reaction Part 3

    May 21, 2025·46m
  123. 123

    Ep 238: AI 2027 Reaction Part 2

    May 20, 2025·48m
  124. 124

    Ep 237: AI 2027 Reaction. Part 1

    May 16, 2025·53m
  125. 125

    Ep 236: Max Velthoven, legal science, AI and epistemology.

    Apr 25, 2025·1h 10m
  126. 126

    Ep 235: The Simulation Hypothesis

    Apr 9, 2025·1h 50m
  127. 127

    Ep 234: On the Evolution of Reason

    Mar 4, 2025·43m
  128. 128

    Ep 233: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands" Part 1

    Feb 20, 2025·1h 11m
  129. 129

    Ep 232: Karl Popper's "The Myth of the Framework" Sections IV to VI. "The Critical Method": deep dive

    Feb 5, 2025·1h 23m
  130. 130

    Ep 231: Karl Popper's "The Myth of the Framework" Sections I to III. Discussing discussions: deep dive

    Jan 25, 2025·1h 36m
  131. 131

    Ep 230: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”Time Travel” Part 3

    Jan 20, 2025·1h 33m
  132. 132

    Ep 229: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 2

    Jan 17, 2025·53m
  133. 133

    Ep 228: Knowledge Beyond Belief

    Dec 30, 2024·56m
  134. 134

    Ep 227: "What is Capitalism?" - an encounter between Objectivism and Critical Rationalism.

    Dec 15, 2024·1h 51m
  135. 135

    Ep 226: Realism and the purposes of philosophy.

    Dec 12, 2024·2h 17m
  136. 136

    Ep 225: Livestream from November 27, 2024

    Nov 28, 2024·1h 56m
  137. 137

    Ep 224: Shapes, Time, and Holism - by Julian Barbour

    Nov 20, 2024·1h 54m
  138. 138

    Ep 223: The Deutsch Files IV (ToKCast version)

    Oct 17, 2024·1h 28m
  139. 139

    Ep 222: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 1

    Oct 15, 2024·51m
  140. 140

    Ep 221: Do Not Destroy The Means of Error Correction

    Sep 27, 2024·26m
  141. 141

    Ep 220: Criticism is never enough

    Sep 25, 2024·39m
  142. 142

    Ep 219: Response to Peter Boghossian Part 3, Appendix

    Sep 24, 2024·24m
  143. 143

    Ep 218: Peter Boghossian Response PART 2

    Sep 23, 2024·1h 3m
  144. 144

    Ep: 217 Peter Boghossian Response Part 1

    Sep 22, 2024·1h 17m
  145. 145

    Ep 216: Astrobiology and Cancer

    Sep 13, 2024·1h 24m
  146. 146

    Ep 215: Charley Lineweaver

    Sep 9, 2024·1h 20m
  147. 147

    Ep 214: Resources, Wealth, Technology, Error Correction and Knowledge Creation

    Jul 24, 2024·1h 27m
  148. 148

    Ep 213: ToKCast in Auckland - live

    Jul 11, 2024·1h 9m
  149. 149

    Ep 212: Livestream 3, June 28 2024

    Jun 28, 2024·2h 25m
  150. 150

    Ep 211: Livestream 2, June 26 2024

    Jun 27, 2024·1h 18m