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 Enlightenment. This is a sort of disjointed episode as I have in mind a particular audience of sophisticated thi...
Mar 04, 2025•43 min•Ep 235•Transcript available on Metacast 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 the most cited in the social sciences and so far more people - especially in academia - are familia...
Feb 20, 2025•1 hr 11 min•Ep 234•Transcript available on Metacast 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 reading. When should a discussion reach agreement? 16:39 Section IV d reflection. Quibbling with Pop...
Feb 05, 2025•1 hr 23 min•Ep 233•Transcript available on Metacast 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: timestamps for this episode: 00:00 Purpose of this new series 05:41 Woke, DEI and Popper 10:47 Poppe...
Jan 25, 2025•2 hr 36 min•Ep 232•Transcript available on Metacast 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 VR time travel tell us about physics? 11:05 Personhood and time travel 13:30 Highly unlikely events, ...
Jan 20, 2025•2 hr 33 min•Ep 231•Transcript available on Metacast 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.
Jan 17, 2025•53 min•Ep 230•Transcript available on Metacast 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 23:53 Why GR and QM do not mesh. 26:57 Newtonian Gravity II 27:43 Knowledge is… 29:11 Knowledge creatio...
Dec 30, 2024•56 min•Ep 229•Transcript available on Metacast 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 progress is not inevitable. 12:06 Yaron on humans vs other animals 15:14 Yaron on why capitalism is retr...
Dec 15, 2024•2 hr 51 min•Ep 228•Transcript available on Metacast 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
Dec 12, 2024•2 hr 17 min•Ep 227•Transcript available on Metacast A long "ask me anything" episode live and off the cuff. Apologies for the audio quality.
Nov 28, 2024•2 hr 56 min•Ep 226•Transcript available on Metacast 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 physics by an iconoclastic scientists working at the deepest foundations of his subject. The video v...
Nov 20, 2024•2 hr 54 min•Ep 225•Transcript available on Metacast 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 the other "Deutsch Files" as well as earlier content Naval and I produced about all the Big Questions ...
Oct 17, 2024•1 hr 28 min•Ep 224•Transcript available on Metacast 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
Oct 15, 2024•51 min•Ep 223•Transcript available on Metacast 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 explore some of the institutions which emerge from such a commitment, but which themselves can also be re...
Sep 27, 2024•26 min•Ep 222•Transcript available on Metacast 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.
Sep 25, 2024•39 min•Ep 221•Transcript available on Metacast 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.
Sep 24, 2024•24 min•Ep 220•Transcript available on Metacast 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.
Sep 23, 2024•1 hr 3 min•Ep 219•Transcript available on Metacast 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.
Sep 22, 2024•1 hr 17 min•Ep 218•Transcript available on Metacast 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/~charley/papers/LineweaverDaviesVincent2014.pdf For more recent work on the theory see: https://ui.adsab...
Sep 13, 2024•1 hr 24 min•Ep 217•Transcript available on Metacast 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 - The Fermi Problem and the “Planet of the Apes” Hypothesis 28:37 - Natural experiments in the evolution...
Sep 09, 2024•1 hr 20 min•Ep 216•Transcript available on Metacast 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 warning: many Australian examples are employed here. A tiny bit of Trump, a dashing of Deutsch, a yard o...
Jul 24, 2024•1 hr 27 min•Ep 215•Transcript available on Metacast This is a recording (with a brief introduction first) of a keynote address I gave to open the 2024 "Naturalistic Decision Making Association" conference. People from business, government and academia came together for 3 days to talk about how to make better decisions under pressure. It was an opportunity for me to share the work of David Deutsch and Karl Popper with everyone from people working in international militaries and government defence organisations, through to leaders in business and u...
Jul 11, 2024•1 hr 9 min•Ep 214•Transcript available on Metacast More questions, more lengthy and more verbose than ever. Enjoy, or drift of to sleep with me ;)
Jun 28, 2024•2 hr 25 min•Ep 213•Transcript available on Metacast Fear not! ToKCast is not becoming a pure Q&A "show". This is literally a kind of "break" for me that I find easy and I note the listeners find fun. Today's a little shorter and - here's some of the topics covered! 00:00: David Deutsch mentioned on Lex Fridman 04:15: Dennis Noble debates Richard Dawkins on the selfish gene 16:47: The goal driven life and AI 27:51 Self similarity - minds and universes 34:39: The hard problem of consciousness and Popperian epistemology 41:30: Wave particle dual...
Jun 27, 2024•1 hr 18 min•Ep 212•Transcript available on Metacast I put out a call on Twitter/@X for questions and got a deluge. Between those and more from YouTube itself - this is the result ranging over predicting the future, through to theories of learning, AGI and AI, optimism and epistemology - many of the major hits and more.
Jun 25, 2024•2 hr 15 min•Ep 211•Transcript available on Metacast Riffing on Karl Popper and David Deutsch (especially). A broad overview, covering lots of the basics of "social" or "rational" choice theory, Bayesianism (again!), misconceptions, good ideas and bad. Errors my own as always.
Jun 17, 2024•1 hr 3 min•Ep 210•Transcript available on Metacast Here we explore the distinction between classical notions of time (including spacetime physics) as approximations to how time is understood in the multiverse. How perfectly deterministic laws lead to subjective unpredictability. Consequences for free will, questions about what happened before time began (or after it ends), new discoveries since the publication of The Fabric of Reality was published in 1997 and David's subtle alterations to phrasing between The Fabric of Reality and The Beginning...
Jun 04, 2024•39 min•Ep 209•Transcript available on Metacast If you are distracted by, or simply prefer a version without, the background music - you can find that here: https://youtu.be/xSbqTTs1nl0 My preferred version is here: https://youtu.be/2IneL4VpShE as there are some helpful (though not essential) visuals. This is about knowledge creation and the the commonalities between the two forms known (evolution (by natural selection) and explanatory) and the differences between them. It teases out and synthesises some of the work of Darwin, Popper and Deut...
May 21, 2024•27 min•Ep 208•Transcript available on Metacast Sam Kuypers is a theoretical physicist who specialises in the physics of time. If you have the time, Sam can take up as much of it as you like telling you about how our ideas of time have changed…over time. As Sam will reveals: times, they are not a-changing. But there is change! Newtonian physics has a notion of time (or at least Newton himself did), Relativity as discovered by Einstein in the early 1900s radically transformed our notion of what time is and now, in the 21st Century, Sam Kuypers...
Apr 12, 2024•2 hr 46 min•Ep 207•Transcript available on Metacast Part 2: Time is in the instant. The instant is not in time. More on the quantum theory of time and how the "spacetime" view of time, and the flow of time are false. How time relates to the "block universe" model and how the multiverse fixes the paradoxes at the heart of our common sense (and classical physics) ideas about time - more readings from "The Fabric of Reality" chapter 11 and in addition: A couple of acrostics about David Deutsch in terms of "Popper". David's changing view of free will...
Mar 18, 2024•53 min•Ep 206•Transcript available on Metacast 
