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Rating
4.8from
This podcast has
271 episodes
Language
EnglishPublisher
Brett HallExplicit
No
Date created
2018/12/17
Latest episode
2026/10/06
Average duration
60 min.
Release period
18 days
Description
This is a podcast largely about the work of David Deutsch and his books ”The Beginning of Infinity” and ”The Fabric of Reality”.
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Check latest episodes from ToKCast podcast
Ep 271: Super Intelligence: Then and Now. Fiction and Reality. Part 1
2026/10/06
This is Part 1 of 2 where I compare and contrast what philosophers were saying about the possibility of "Super Intelligence" many years ago with respect to the discourse today. What did Nick Bostrom say over a decade ago, and what is he saying today? How is the discourse being framed and what are the major commentators saying, in their own words?
Ep 270: The Gradient Descent into Doom.
2026/09/22
A spontaneous set of comments on the ongoing AI scare of 2026. What's happening in the media right now, on social media, in culture and at the highest levels of government. Why the pessimism and catastrophism? What can be done? Quite a few slides are referred to, but I do read through them. Incase you want the video - it's here: https://youtu.be/mItTFoYSCcA
Ep 269: The Quantum Observer Effect?
2026/09/22
Youtuber Warren Smith of https://www.youtube.com/@SecretScholars made some remarks about the double slit experiment. I assess his claims.
Ep 268: AGI has arrived podcast
2026/09/07
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).
2026/08/26
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
2026/08/20
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
2026/08/15
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
2026/07/30
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.
2026/07/04
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
2026/05/04
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
2026/04/23
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!
2026/04/05
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.
2026/03/11
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
2026/02/16
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.
2026/02/09
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.
Podcast reviews
Read ToKCast podcast reviews
GAUZ2023 2023/08/06
Spectacular. Jaw dropping. Mind expanding.
Brett’s work distilling and clarifying how to think about complex philosophical and scientific ideas has dramatically shifted my worldview. This podc...
OmarMo93 2023/01/22
Useful and engaging
Brett takes physicist concepts and breaks them down in a clear and engaging way, a must listen!
RKMoreira 2021/09/06
Extraordinarily useful.
I’m a non-physicist (a busy physician, with only very basic knowledge of physics) who is very much interested in understanding the reality of our univ...
pakerparker 2021/08/22
Fantastic companion
I’m only a few chapters in, but so far this has been an incredible companion to reading Beginning of Infinity.
snchou0 2020/10/31
Good in-packing of Deutsch-Popper ideas
Done in a clear and engaging way.
Andyboi07 2020/02/13
Keep it up!
Clear but thorough explanation of Deutsch/Popper
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