ToKCast

Ep 268: AGI has arrived podcast

Today CEO of the world's most valuable company, Nvidia, Jensen Huang, announced "AGI has arrived". https://x.com/JensenHuang/status/2096700264569090384?s=20 Some reflections on all that.

Ep 267: The Orthogonality Thesis is Moral Relativism. (Response to Sam Harris on AI).

This is in response to episode 489 of Sam Harris' "Making Sense" podcast - in a section only available via subscription. I have clipped the approximately 60 seconds worth of material I am narrowly responding to for fair use in this commentary. The case unpacked is, roughly, that morality can be disconnected from (is orthogonal to) reason broadly is no more than a restatement of moral relativism - and hence false. Morality and science are about objective reality so cannot be “orthogonal”. Moral progress goes hand-in-hand with reason broadly and any “sufficiently advanced” intelligent system would not only realise this, they must understand it to make unbounded, rapid progress.

Ep 266: Facts, Fantasy and Critical Thinking

A analysis in Popperian style of Candace Owens' "mode" of debate and discussion, approach to evidence and thinking and a comparison to the more mainstream evaluations of this debate.

Ep 265: David Deutsch's "The Fabric of Reality" Chapter 14 "The Ends of the Universe" Part 2 The Omega Point

All about the distant future. What does cosmology tell us about the fate of the universe, life and intelligence in some ultimate sense? Frank Tipler's The Omega Point Theory is the primary focus, but throughout we consider the centrality of The Turing Principle for predictions about the future of the cosmos, Roger Penrose's "Conformal Cyclic Cosmology" and some of Freeman Dyson's ideas. Timestamps and Chapters: 0:00 – Introduction: Longevity, Immortality, the Singularity & the Omega Point 5:50 – Recap: The Four Strands, Knowledge & the Multiverse 8:20 – Frank Tipler’s Omega Point Theory Introduced 9:00 – Anthropic Principles (Weak, Strong & Final) 10:30 – The Turing Principle as the Key to the Omega Point 1 3:40 – Modern Cosmology Challenges: Expanding Universe, Dark Energy & Heat Death 20:20 – Cosmological Models That Allow Unlimited Computation (Big Crunch Conditions) 22:00 – Tipler’s Rejoinders & the Case for Eventual Collapse 24:00 – Computers Near the Omega Point & Mutual Implication with the Turing Principle 30:00 – Defending the Strong Turing Principle & the Comprehensibility of Reality 35:00 – Infinite Thoughts, Virtual Reality & Colonisation Deadlines 37:00 – Roger Penrose’s Conformal Cyclic Cosmology (CCC) 43:00 – Freeman Dyson’s Ideas & Infinite Computation in an Expanding Universe 46:50 – Properties of the Omega Point: Omniscience, Omnipotence & Omnipresence 1:15:00 – The Omega Point as “God”, Resurrection & Virtual-Reality Heaven 1:18:50 – Critique of the Technological Singularity (Kurzweil) & Mind Uploading 1:22:00 – The Limits of Far-Future Prediction (Ancient Builder Analogy) 1:25:00 – Conclusions & Takeaways: Take the Turing Principle Seriously

Ep 264: David Deutsch's "The Fabric of Reality" Chapter 14 "The Ends of the Universe" Part 1

What do our best explanations tell us about the ultimate ends of the universe? What is the difference between forming a world view about any one of the four strands (evolution, epistemology, quantum physics or computation) versus taking all four of them seriously?

Ep 263: David Deutsch's "The Fabric of Reality" Chapter 13 "The Four Strands" Part 4 - and final.

How do the Four Strands of the Fabric of Reality - Quantum Physics, Computation, Epistemology and Evolution by Natural Selection hold together? What does taking them each seriously and all of them together seriously? Is it possible to construct a worldview without one of them or based on a single one alone? What do they imply about free will and consciousness? Doesn't making progress require us to assume them false? All this and more.

Ep 262: David Deutsch's "The Fabric of Reality" Chapter 13 "The Four Strands" Part 3

This episode is heavily focussed on Dawkin's "Selfish Gene" explanation of Darwin's evolution by natural selection. Obviously there are readings from the relevant part of this chapter from The Fabric of Reality but I augment that with sections from "The Selfish Gene" itself as well as "The Beginning of Infinity" as well as a larger portion of me providing additional unpacking and exposition.

Ep 261: Objective Morality II

Do not destroy the means of error correction. A deep unification of knowledge akin to unifying quantum theory with computation to create the theory of quantum computation. David Deutsch will be known for not merely forging the basis of quantum computing but also a new basis for morality and epistemology. I explain much of that here. "What should we do next?" is a question with an answer that is right or wrong, good or evil, better or worse. All existing moral frameworks philosophers debate are theories that can serve as criticisms of "what to do next". Morality is as objective as domain as mathematics, physics or anything else. Relativism, like it's sister philosophy dogmatism is false.

Ep 260: I don't believe it!

Response to a question about my discussion with @drpeterboghossian here: https://youtu.be/72vhtT0pFmA?si=hAx1kPho4DkLkBFN This is yet another way of coming at a critique around the concept of "belief" or those who profess to "believe" and so on using Deutsch's approach that knowledge is "information with causal power". I explore that for around the first 40 mins. If you're in a hurry, skip to the final 15 or 20 minutes where I get to responding to the meat of the matter in the question itself.

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

In this, the third and final part of a series, I break down some work Michael Levin has done with sorting algorithms. That seems very dry until you hear his claim that these algorithms that are well known and have been studied for decades exhibit extremely unusual behaviour never before spotted because "no one ever bothered to look". This part of the interview is between Ferris and Levin is referring to this paper: https://journals.sagepub.com/doi/10.1177/10597123241269740 which is available on the arXiv at https://arxiv.org/pdf/2401.05375 and which a Forbes writer authored this "explainer" of sorts here: https://www.forbes.com/sites/andreamorris/2025/11/13/the-secret-life-of-algorithms/ and which Levin himself explains here: https://thoughtforms.life/algorithms-redux-finding-unexpected-properties-in-truly-minimal-systems/ Michael Levin has done some very interesting work in biology around worms regrowing heads and so on. But this "research" is quite a departure from that. Get my book here: https://www.amazon.com/Farthest-Reaches-Important-Entities-Universe/dp/B0GRR2LLZV/ref=sr_1_1?crid=157SNHQC0QFHK&dib=eyJ2IjoiMSJ9.D5jlSZxhaQmrjzrnV209t0-bvV-i5un48Fwu5tb8Y42AKywnL9YRXJ8ylEe8EPH2SBLoKpU2AXag0llMQ3XfVILgUrAiohRqKjRaBiNdrcUqVQIV6MyEUBdAWiwjufzS4dCs_m5HBm-Px8errzQVyqzjO7F9UEGMeOgpjDGyJBB5Qbi98LHHSYb91z0J5sP9fRT8BaP4wXNvi4p0Va4kbQNBXxPjUb0OOwORDDGbWGo.HBT8A2pQNHYK8NyTIn91VtLaPJEMt17xp7qCt4bNcv4&dib_tag=se&keywords=the+farthest+reaches&qid=1773231582&sprefix=the+farthest+reac%2Caps%2C346&sr=8-1

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

This is the second in a multipart series where I react to some interviews with ‪@drmichaellevin‬ a biologist who, among other things, specialises in bioelectricity. His research can be found here: https://www.drmichaellevin.org and his "explainer articles" for his own professional papers here: https://thoughtforms.life . In this episode I mention the discussion he had with ‪@timferriss‬ which is found here: • Dr. Michael Levin — Reprogramming Bioelect... Part 1 is here: • Reaction to Michael Levin, Part 1: Categor... Part 3 will be out soon.

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

This is the first in a multipart series where I react to some interviews with @drmichaellevin - a biologist who, among other things, specialises in bioelectricity. His research can be found here: https://www.drmichaellevin.org/publications/ and his "explainer articles" for his own professional papers here: https://thoughtforms.life . Although in this first episode I mention the discussion he had with @timferriss which is found here: https://youtu.be/kz1jnoKfRrI?si=O-TTxrVleMbDsEH8 I never actually get to it in this first part. I do comment on Michael's interview with @lexfridman found here: https://youtu.be/Qp0rCU49lMs?si=jYN_SbXCd6ziO_pe and even then only in brief because I'm verbose. Part 2 will be out soon.

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

Comparing Kuhn and Popper on Quantum Theory: Here we go deeper into the differences between Karl Popper and Thomas Kuhn's account of how science moves from one theory to another. David applies the theory set out in part 1 of this chapter to the specific case of quantum theory. Did social forces have a major impact on whether quantum theory was adopted as Kuhn would have it, or were rational factors like argument and experiment crucial in dictating how science broadly, physics and the community of physicists took on a new "counter-cultural" idea?

Ep 255: Does this research explain how LLMs work?

I take a look at these three papers: 1. https://www.arxiv.org/abs/2512.22471 2. https://arxiv.org/abs/2512.23752 3. https://arxiv.org/abs/2512.22473 Collectively titled "The Bayesian Attention Trilogy" along with some other material - in particular an interview with one of the authors "Vishal Misra" - https://www.engineering.columbia.edu/faculty-staff/directory/vishal-misra For those familiar with my output on this you can probably skip to about halfway through at 42:40. Prior to this is a lot of background on Induction, Bayesianism, Critical Rationalism and so on that people may have heard from me before in different contexts - although for what it's worth these are new ways of expressing those ideas. At the end I am reacting to a video found here: https://www.youtube.com/watch?v=uRuY0ozEm3Q

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

This is effectively part 3 in a series of responses to the Prime Minister of Australia about censorship, legislation, policy, philosophy, Bondi and Social Media. The Prime Minister attempted to explain, as best he could, the reasons for banning under-16 year olds from certain social media platforms. I remark on an interview he conducted and make some broader remarks in conclusion to a short series on his response to the Bondi tragedy and other issues. These are largely off-the-cuff rather than prepared remarks - so expect the tone, tenor, tempo and expression to be a little different than usual.

Ep 253: Further Comments on the Bondi Massacre.

Here I remark on comments made by Australian Home Affairs Minister Tony Burke and Education Minister Jason Clare and then make some broader points about the recent tragedy on Bondi Beach. This is part 2 of a response to the Prime Minister of Australia and others.

Ep 252: Response to the Prime Minister of Australia

A reaction "episode" where I make some remarks about a speech by Anthony Albanese, Prime Minister of Australia, in the wake of the Bondi Beach Massacre by Islamists terrorists who attacked Jews at a Hanukkah celebration on 14 December, 2025

Ep 251: OK Doomer!

This is a reproduction of a talk I gave to some trainee surgeons in Sydney who, among other things, were learning about AI as it was affecting their own field. It is, in a sense, a summary of many of the points I have been making recently on this channel with respect to AI and pessimism around it.

Ep 250: The Farthest Reaches - Audiobook

The Farthest Reaches is a book about "Explanatory Universality". Explanatory Universality is a concept introduced by physicist and philosopher David Deutsch in his book "The Beginning of Infinity". Links, as mentioned in the audiobook can be found in the ebook available for free here: https://www.bretthall.org/the-farthest-reaches.html This present work follows the logic of that concept as it applies to education, psychology, morality, immigration, the trans issue, "evolutionary psychology" and the significance of people to physical reality and much more. This version is significantly longer and with superior audio production compared with the original podcast of the same name. These are the chapters and timestamps: 00:00 Preface 21:51 Chapter 1 - Universality and Reach 29:38 Chapter 2 - The Reach of Explanatory Universality 38:53 Chapter 3 - Explaining Explanatory Universality 47:31 Chapter 4 - Explanatory Universality and Education 1:00:27 Chapter 5 - Explanatory Universality, Psychological Science and IQ 1:03:41 Chapter 6 - Explanatory Universality and Adopting Culture 1:10:26 Chapter 7 - Explanatory Universality and IQ Part 2 1:14:58 Chapter 8 - Explanatory Universality and the “Trans Issue” 1:22:57 Chapter 9 - Explanatory Universality and Immigration 1:48:12 Chapter 10 - Explanatory Universality and Ethnicity 2:11:39 Chapter 11 - Explanatory Universality and Multiculturalism 2:23:22 Chapter 12 - Explanatory Universality and Mental Illness 2:32:35 Chapter 13 - Explanatory Universality, Hangups and Sexuality 2:41:26 Chapter 14 - Explanatory Universality and The Woke Left and The Woke Right 2:48:29 Chapter 15 - Explanatory Universality and Optimism 2:58:20 Chapter 16 - Explanatory Universality and Artificial Intelligences 3:09:59 Chapter 17 - Universality, Freedom of Speech and Freedom of Reach 3:17:07 Chapter 18 - Explanatory Universality and Evolutionary Psychology 3:31:20 Chapter 19 - Explanatory Universality and Individuality 3:39:05 Chapter 20 - Summary and Conclusions 4:08:18 Acknowledgements and Afterward The author thanks David Deutsch ( ⁨@DavidDeutschPhysicist⁩ ) Naval Ravikant ( ⁨@NavalR⁩ ) Reid Nicewonder ( ⁨@CordialCuriosity⁩ ) and Peter Boghossian ( ⁨@drpeterboghossian⁩ ) for their crucial support and engagement. And to all other supporters who have contributed to the ongoing viability of ToKCast and my other content output. Brett Hall is a technical advisor and content creator, Ambassador to Conjecture Institute ( ⁨@ConjectureInstitute⁩ ) and Board Member of the National Progress Alliance (www.nationalprogressalliance.org) and holds undergraduate qualifications from: The University of New South Wales )in Physics and the Philosophy of Science) The University of Western Sydney (in Science and Mathematics Teaching) and Postgraduate Qualifications from Swinburne University, Melbourne (in Astronomy and Astrophysics). Macquarie University (in the Teaching of English Language) The Australian Catholic University (in Mathematics) and a partially completed post graduate certificate in Geology and Geophysics from Macquarie University. He lives in Sydney, Australia.

• Chapters

Ep 249: The Farthest Reaches Part 4 and Conclusion

Chapters and Timestamps 00:06 Chapter 13: Explanatory Universality, Hangups and Sexuality 08:07 Chapter 14: The Woke Left and the Woke Right 15:38 Chapter 15: Universality and Optimism 25:04 Chapter 16: Universality and Artificial Intelligences 35:54 Chapter 17: Universality, Freedom of Speech and Freedom of Reach 42:44: Chapter 18: Summary and Conclusions