Brett Hall

ToKCast

Society EN ↓ 263 episodes

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.

Author

Brett Hall

Category

Society

Podcast website

brettroberthall.podbean.com

Latest episode

Jul 4, 2026

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Episodes

Ep 238: AI 2027 Reaction Part 2 20.05.2025

Note that Part 1 is found in Episode 237 or can be viewed here: https://www.youtube.com/watch?v=Uq_txKy-XMQ   I react to the contents of this article https://ai-2027.com with some further general comments on ‪@DwarkeshPatel‬ 's interview with two of the authors here: https://www.youtube.com/watch?v=htOvH12T7mU

Ep 237: AI 2027 Reaction. Part 1 16.05.2025

I react to the contents of this article https://ai-2027.com with some further general comments on ‪@DwarkeshPatel‬ 's interview with two of the authors here:    • 2027 Intelligence Explosion: Month-by...     Youtube version of this podcast is here: https://www.youtube.com/watch?v=Uq_txKy-XMQ

Ep 236: Max Velthoven, legal science, AI and epistemology. 25.04.2025

Max is a tax lawyer who is applying Popperian epistemology to legal science and issues in AI. Links to some more of his work, and the slides to accompany part of this video are below. Slides for Max's talk(s): https://www.bretthall.org/popper-and-legal-science.html Max’s journal article on AI with Eric Marcus (in NLFiscaal TaxTech): NLFiscaal | Problems in AI, their roots in philosophy, and implic...

Ep 235: The Simulation Hypothesis 09.04.2025

This is a "megasode" combining two episodes from Youtube all about the Simulation Hypothesis. In the first part I provide the philosophical basis for the simulation hypothesis as explained especially by Nick Bostrom and compare it to other "ultimate" explanations of reality. In part 2 I discuss and evaluate the arguments made by Scott Adams and Joe Rogan who endorse some version of Bostrom's argum...

Ep 234: On the Evolution of Reason 04.03.2025

I recently had the opportunity to participate in "Spectrum Street Epistemology" with  @drpeterboghossian  and a number of others including  @destiny  . This episode was inspired by both that event and the many other conversations I had with Peter, Reid, David, Evan, Mia and Travis across the days I spent in Florida with those excellent people engaged in the important work of defending the Enlighte...

Ep 233: David Deutsch’s ”The Fabric of Reality” Chapter 13 ”The Four Strands" Part 1 20.02.2025

The first part of my discussion of the differing visions of science and how scientific knowledge "grows" (or not) according to Thomas Kuhn vs Karl Popper as outlined in this chapter of "The Beginning of Infinity". Kuhn's "The Structure of Scientific Revolutions" explains the concept of a "paradigm" and "paradigm shifts" comparing "revolutionary" and "normal" periods of science. Kuhn's work remains...

Ep 232: Karl Popper's "The Myth of the Framework" Sections IV to VI. "The Critical Method": deep dive 05.02.2025

The second in the series on "The Myth of the Framework" paper. Timestamps: 00:00 Introduction with some reflections on Joe Rogan and Gad Saad 05:14 Section IVa reading - on “Confrontations” 06:32 Section IVa reflection 09:48 Section IVb reading 10:17 Section IVb reflection 12:14 Section IVc reading - tolerance and respect 13:26 Section IV c reflection on Herodotus and tolerance 15:08 Section IV d...

Ep 231: Karl Popper's "The Myth of the Framework" Sections I to III. Discussing discussions: deep dive 25.01.2025

I take another deep dive into a deeply insightful and original lecture by Karl Popper: The Myth of the Framework. In this first part (of 4) I spend most of the episode unpacking our motivations, Popper's own thoughts on his success in combating bad ideologies and the purposes of discussion. Indeed this piece can be considered an instruction manual for discussions: how to have them and why. Below:...

Ep 230: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”Time Travel” Part 3 20.01.2025

The best part! If you missed the others, don't miss this one. All four strands come together to explain the possibility of time travel and the intrigue that arises when considering travelling to "your" past or future to visit "yourself". Rough timestamps follow: 00:00 introduction and the significance of virtual reality 04:03 Physically possible renderings and resolving paradoxes 07:30 what does V...

Ep 229: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 2 17.01.2025

An outside broadcast as you will hear. Image generation and virtual reality provide a window on the physics of time travel. Why is that? And what about all those time travel paradoxes? The resolution to all is found herein.

Ep 228: Knowledge Beyond Belief 30.12.2024

An assortment of topics looking forward to 2025. Timestamps:   00:00 Truth is indispensable 04:06 The “search for truth” is error correction 08:11 Remarks on selflessness and personhood. How can we square the two? 09:14 Decisions and free will and creativity 10:46 Truth and the two senses of “believe”. 13:30 Belief, epistemology and psychology 17:16 “Popperian” knowing. 18:07 Newtonian Gravity I 2...

Ep 227: "What is Capitalism?" - an encounter between Objectivism and Critical Rationalism. 15.12.2024

Live from Sydney, Yaron Brook and Nikos Sotirakopoulos join me on stage to discuss capitalism, liberty, personhood, energy policy, Israel and antisemitism and much more. Rough timestamps are here: 00:00 Brett’s welcome and introduction 02:32 Nikos on “What is Capitalism?” 04:21 Yaron on “What is Capitalism?” 07:33 Brett on the relationship between personhood and capitalism. 10:02 Nikos on why prog...

Ep 226: Realism and the purposes of philosophy. 12.12.2024

I discuss the point of philosophy and how "concrete" the work of Karl Popper and David Deutsch are in marshalling examples taken directly from science in order to illustrate how philosophy solves problems in other areas. Then I have some lengthy remarks on some recent criticism of Popper and Deutsch which is found here: https://substack.com/home/post/p-152605209

Ep 225: Livestream from November 27, 2024 28.11.2024

A long "ask me anything" episode live and off the cuff. Apologies for the audio quality.

Ep 224: Shapes, Time, and Holism - by Julian Barbour 20.11.2024

Julian Barbour is an independent British Physicist and the author of technical and popular books including the best selling "The End of Time" and most recently "The Janus Point: A New Theory of Time". In this lecture, Julian shows just how interesting Newtonian Mechanics can get. Can it be a fundamental theory of space, time and physical reality? This is a tour de force of the history of ideas in...

Ep 223: The Deutsch Files IV (ToKCast version) 17.10.2024

After a short introduction by me, the remainder of this episode is a reproduction of "The Deutsch Files IV" the latest in a series of conversations between myself, Naval Ravikant and David Deutsch about a wide variety of topics including, and sometimes going far beyond the contents of "The Fabric of Reality", "The Beginning of Infinity" and Constructor Theory. Go to https://nav.al to access all th...

Ep 222: David Deutsch’s ”The Fabric of Reality” Chapter 12 ”TimeTravel” Part 1 15.10.2024

Is time travel into the past and the future possible? What is time dilation? Subjective and objective senses of "time travel". David Deutsch's own documentary on Time Travel from the BBB (192) https://youtu.be/C6_gxoLwrWw?si=8vw8cwbP49XkY6e8

Ep 221: Do Not Destroy The Means of Error Correction 27.09.2024

Here I present a "positive vision" of the kind I complained was absent in the episode right before this ("Criticism is never enough"). Here I am riffing off a line which contains a deep truth out of the Beginning of Infinity where Socrates is speaking with the god Hermes. In that passage David links a moral injunction "Do not" to an epistemological concept (error). From this stepping stone I explo...

Ep 220: Criticism is never enough 25.09.2024

Another response episode. This time to Douglas Murray and Jordan Peterson. Douglas and Jordan are seeking a way to construct a positive vision for society, but they seem at a loss for what in fundamental terms, this might include. Part 1 of 2.

Ep 219: Response to Peter Boghossian Part 3, Appendix 24.09.2024

Parts 1 and 2 were, admittedly, long. So if you could not persevere through those, this gets the major points out serving both as an appendix to tie up some loose ends and as a summary of parts 1 and 2.

Ep 218: Peter Boghossian Response PART 2 23.09.2024

Here I get to the part of the discussion Peter has about my own "airchat" explanation of "anyone can understand anything". I go through arguments based on the Church-Turing Principle, computational universality and how denials of explanatory universality are appeals to the supernatural and other topics.

Ep: 217 Peter Boghossian Response Part 1 22.09.2024

The great epistemologist, Peter Boghossian, created a video on Youtube that responded to me, in part. It's to be found in full here: https://youtu.be/5Vf-T8K0_zE?si=T2XkG8h8iNj1ZXGR This first part is largely a response to Richard Dawkins on his notion of "Middle World" and Michael Shermer's notion we are not evolutionarily capable of understanding anything.

Ep 216: Astrobiology and Cancer 13.09.2024

Part 2 in a series about the work of researcher Charley Lineweaver. In this episode, a targeted focus on the one thing we did not discuss out of all of Charley's scientific interests in my interview with him in Ep 215: his recent work with Paul Davies on "The Atavistic Model" of Cancer. For the peer reviewed paper on The Atavistic Model by Lineweaver and Davies see: https://www.mso.anu.edu.au/~cha...

Ep 215: Charley Lineweaver 09.09.2024

A conversation with physicist, cosmologist, astrobiologist, polyglot and polymath - Charley Lineweaver. 00:00 - My introduction 08:57 - Charley’s fascinating early years 12:14 - From an English/History degree to physics 13:53 - Charley’s historic work on the Cosmic Microwave Background 17:34 - Methods of probing deep space 19:51 - Our accelerating universe 22:15 - Dark Matter Candidates 23:20 - Th...

Ep 214: Resources, Wealth, Technology, Error Correction and Knowledge Creation 24.07.2024

The title is long enough so you look for more here? ;) This one is largely, in truth about energy and what it can do for us. Across the almost 90 minutes I cover how the concepts in the title logically cohere and depend one upon the other and we take a look at "the universal constructor" and compare the possibilities for an optimistic distant future with the reality of our situation now. Fair warn...

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