
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…
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
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Episodes
- 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
Ep 259: Reaction to Michael Levin Part 3: Bait and Switch, Podcastistan and Surprising(?) algorithms.
·1h - 3
Ep 258: Reaction to Michael Levin, Part 2: Bioelectricity, Consciousness and Knowing
·1h 39m - 4
Ep 257: Reaction to Michael Levin, Part 1: Categories and Continuums.
·1h 8m - 5
Ep 256: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands” Part 2
·1h 10m - 6
Ep 255: Does this research explain how LLMs work?
·1h 23m - 7
Ep 254: Australia: The Land of Bans. (Social Media prohibited for under-16s. Analysis of the arguments "for".)
·1h 33m - 8
Ep 253: Further Comments on the Bondi Massacre.
·35m - 9
Ep 252: Response to the Prime Minister of Australia
·1h 5m - 10
Ep 210: Livestream - Question, Answer and repeat for 2+ hours
·2h 15m - 11
Ep 209: Rational Decision Making
·1h 3m - 12
Ep 208: David Deutsch’s ”The Fabric of Reality” Chapter 11 ”Time: The First Quantum Concept” Part 3
·39m - 13
Ep 207: Variations on a Conjecture
·27m - 14
Ep 206: Sam Kuypers (Time: The First Quantum Concept Part 3 - and more).
·1h 46m - 15
Ep 204: David Deutsch’s ”The Fabric of Reality” Chapter 11 ”Time: The First Quantum Concept” Part 1
·1h - 16
Ep 203: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 4
·1h 17m - 17
Ep 181: The Big Bang Livestream ToKCast
·1h 17m - 18
Ep 180: Livestream: ”The Open Hand of Reason”
·2h 10m - 19
Ep 251: OK Doomer!
·31m - 20
Ep 250: The Farthest Reaches - Audiobook
·4h 19m - 21
Ep 249: The Farthest Reaches Part 4 and Conclusion
·1h 12m - 22
Ep 248: AI and Philosophy of Science
·1h 26m - 23
Ep 247: The Farthest Reaches Part 3
·47m - 24
Ep 246: The Farthest Reaches Part 2
·56m - 25
Ep 245: The Farthest Reaches (Part 1)
·45m - 26
Ep 244: Deep learning is not "inductive".
·23m - 27
Ep 243: In praise of ignorance - the podcast. With Liberty Fitz-Claridge
·1h 36m - 28
Ep 242: Is religion worth preserving?
·18m - 29
Ep 239: AI 2027 Reaction Part 3
·46m - 30
Ep 238: AI 2027 Reaction Part 2
·48m - 31
Ep 237: AI 2027 Reaction. Part 1
·53m - 32
Ep 236: Max Velthoven, legal science, AI and epistemology.
·1h 10m - 33
Ep 235: The Simulation Hypothesis
·1h 50m - 34
Ep 234: On the Evolution of Reason
·43m - 35
Ep 233: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands" Part 1
·1h 11m - 36
Ep 232: Karl Popper's "The Myth of the Framework" Sections IV to VI. "The Critical Method": deep dive
·1h 23m - 37
Ep 260: I don't believe it!
·1h 7m - 38
Ep 231: Karl Popper's "The Myth of the Framework" Sections I to III. Discussing discussions: deep dive
·1h 36m - 39
Ep 230: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”Time Travel” Part 3
·1h 33m - 40
Ep 229: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 2
·53m - 41
Ep 228: Knowledge Beyond Belief
·56m - 42
Ep 227: "What is Capitalism?" - an encounter between Objectivism and Critical Rationalism.
·1h 51m - 43
Ep 226: Realism and the purposes of philosophy.
·2h 17m - 44
Ep 225: Livestream from November 27, 2024
·1h 56m - 45
Ep 224: Shapes, Time, and Holism - by Julian Barbour
·1h 54m - 46
Ep 223: The Deutsch Files IV (ToKCast version)
·1h 28m - 47
Ep 222: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 1
·51m - 48
Ep 221: Do Not Destroy The Means of Error Correction
·26m - 49
Ep 220: Criticism is never enough
·39m - 50
Ep 219: Response to Peter Boghossian Part 3, Appendix
·24m - 51
Ep 218: Peter Boghossian Response PART 2
·1h 3m - 52
Ep: 217 Peter Boghossian Response Part 1
·1h 17m - 53
Ep 216: Astrobiology and Cancer
·1h 24m - 54
Ep 215: Charley Lineweaver
·1h 20m - 55
Ep 212: Livestream 3, June 28 2024
·2h 25m - 56
Ep 211: Livestream 2, June 26 2024
·1h 18m - 57
Ep 202: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 3
·45m - 58
Ep 201: Progress: Conserving the means of Error Correction. Free Speech, Free Trade and Democracy.
·43m - 59
Ep 200: Chiara Marletto
·1h 28m - 60
Ep 199: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 2
·50m - 61
Ep 198: Bayesianism
·1h 36m - 62
Ep 197: David Deutsch’s ”The Fabric of Reality” Chapter 10 ”The Nature of Mathematics” Part 1: Introduction
·1h 25m - 63
Ep 196: The Mother Military
·43m - 64
Ep 195: Knowledge, Wealth and Constructors
·35m - 65
Ep 194: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part 4: Shor’s Algorithm
·1h 34m - 66
Ep 193: Effortless Stoicism
·26m - 67
Ep 192: Where do ideas come from?
·1h 3m - 68
Ep 191: Science News 2: Dark Matter, Fusion, JWST Latest
·39m - 69
Ep 190: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part3
·35m - 70
Ep 189: Epiphenomena
·18m - 71
Ep 188: Nick Bostrom on AI on ”Talk TV” - analysis
·41m - 72
Ep 187: Red Pens and Fallibilism
·24m - 73
Ep 186: Brett, Naval and more on AI & AGI
·1h 34m - 74
Ep 185: Possibility and Actuality. Facts and Counterfactuals.
·1h 1m - 75
Ep 184: ToKCast Digest - An Overview of Optimism
·1h 21m - 76
Ep 183: St George in retirement syndrome on St Patrick’s day.
·1h 2m - 77
Ep 182: Livestream Science News and AMA
·1h 3m - 78
Ep 179: Livestream March 14, 2023
·1h 35m - 79
Ep 178: Its, Bits, Qubits *Part 2*
·51m - 80
Ep 177: Its, Bits, Qubits. Part 1
·1h 5m - 81
Ep 176: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part 2
·1h 1m - 82
Ep 175: Science News 1: Population III - The First Generation of Stars in the Universe Observed?
·58m - 83
Ep 174: A message for next millennium.
·29m - 84
Ep 173: Brett Talks Twitter 2
·49m - 85
Ep 172: Talents and Testing
·12m - 86
Ep 171: Knowledge and Ignorance 6
·1h 14m - 87
Ep 170: Are creativity and consciousness the same thing?
·18m - 88
Ep 169: Livestream & Happy New Year
·2h 13m - 89
Ep 168: David Deutsch’s ”The Fabric of Reality” Chapter 9 ”Quantum Computers” Part 1
·1h 16m - 90
Ep 167: ”Degrowth” - the plan for civilisational decline and disaster.
·1h 33m - 91
Ep 166: Newsletter 18: A weekend of Twitter
·2h 20m - 92
Ep 165: Knowledge and Ignorance Part 5
·52m - 93
Ep 164: Knowledge and Ignorance Part4
·46m - 94
Ep 163: David Deutsch’s ”The Fabric of Reality” Chapter 8 ”The Significance of Life” Part 2
·1h 11m - 95
Ep 162: Steven Pinker’s ”Rationality” Chapter 7 ”Hits and False Alarms” Part 1
·57m - 96
Ep 161: David Deutsch’s ”The Fabric of Reality” Chapter 8 ”The Significance of Life”.
·56m - 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
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
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
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
Ep 260: I don't believe it!
Hidden gemThe 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
Ep 259: Reaction to Michael Levin Part 3: Bait and Switch, Podcastistan and Surprising(?) algorithms.
Hidden gemThe 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
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
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
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
Ep 255: Does this research explain how LLMs work?
Hidden gemToKCast 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
Ep 254: Australia: The Land of Bans. (Social Media prohibited for under-16s. Analysis of the arguments "for".)
Hidden gemTopCast 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
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
Ep 252: Response to the Prime Minister of Australia
Dec 19, 2025·1h 5m - 110
Ep 251: OK Doomer!
Dec 11, 2025·31m - 111
Ep 250: The Farthest Reaches - Audiobook
Nov 12, 2025·4h 19m - 112
Ep 249: The Farthest Reaches Part 4 and Conclusion
Oct 17, 2025·1h 12m - 113
Ep 248: AI and Philosophy of Science
Oct 13, 2025·1h 26m - 114
Ep 247: The Farthest Reaches Part 3
Sep 22, 2025·47m - 115
Ep 246: The Farthest Reaches Part 2
Sep 16, 2025·56m - 116
Ep 245: The Farthest Reaches (Part 1)
Sep 12, 2025·45m - 117
Ep 244: Deep learning is not "inductive".
Aug 22, 2025·23m - 118
Ep 243: In praise of ignorance - the podcast. With Liberty Fitz-Claridge
Jul 21, 2025·1h 36m - 119
Ep 242: Is religion worth preserving?
Jul 11, 2025·18m - 120
Ep 241: AI 2027 Reaction Part 5: Summary and Conclusions
May 29, 2025·42m - 121
Ep 240: AI 2027 Reaction Part 4
May 22, 2025·22m - 122
Ep 239: AI 2027 Reaction Part 3
May 21, 2025·46m - 123
Ep 238: AI 2027 Reaction Part 2
May 20, 2025·48m - 124
Ep 237: AI 2027 Reaction. Part 1
May 16, 2025·53m - 125
Ep 236: Max Velthoven, legal science, AI and epistemology.
Apr 25, 2025·1h 10m - 126
Ep 235: The Simulation Hypothesis
Apr 9, 2025·1h 50m - 127
Ep 234: On the Evolution of Reason
Mar 4, 2025·43m - 128
Ep 233: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands" Part 1
Feb 20, 2025·1h 11m - 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
Ep 231: Karl Popper's "The Myth of the Framework" Sections I to III. Discussing discussions: deep dive
Jan 25, 2025·1h 36m - 131
Ep 230: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”Time Travel” Part 3
Jan 20, 2025·1h 33m - 132
Ep 229: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 2
Jan 17, 2025·53m - 133
Ep 228: Knowledge Beyond Belief
Dec 30, 2024·56m - 134
Ep 227: "What is Capitalism?" - an encounter between Objectivism and Critical Rationalism.
Dec 15, 2024·1h 51m - 135
Ep 226: Realism and the purposes of philosophy.
Dec 12, 2024·2h 17m - 136
Ep 225: Livestream from November 27, 2024
Nov 28, 2024·1h 56m - 137
Ep 224: Shapes, Time, and Holism - by Julian Barbour
Nov 20, 2024·1h 54m - 138
Ep 223: The Deutsch Files IV (ToKCast version)
Oct 17, 2024·1h 28m - 139
Ep 222: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 1
Oct 15, 2024·51m - 140
Ep 221: Do Not Destroy The Means of Error Correction
Sep 27, 2024·26m - 141
Ep 220: Criticism is never enough
Sep 25, 2024·39m - 142
Ep 219: Response to Peter Boghossian Part 3, Appendix
Sep 24, 2024·24m - 143
Ep 218: Peter Boghossian Response PART 2
Sep 23, 2024·1h 3m - 144
Ep: 217 Peter Boghossian Response Part 1
Sep 22, 2024·1h 17m - 145
Ep 216: Astrobiology and Cancer
Sep 13, 2024·1h 24m - 146
Ep 215: Charley Lineweaver
Sep 9, 2024·1h 20m - 147
Ep 214: Resources, Wealth, Technology, Error Correction and Knowledge Creation
Jul 24, 2024·1h 27m - 148
Ep 213: ToKCast in Auckland - live
Jul 11, 2024·1h 9m - 149
Ep 212: Livestream 3, June 28 2024
Jun 28, 2024·2h 25m - 150
Ep 211: Livestream 2, June 26 2024
Jun 27, 2024·1h 18m