ToKCast

This is the first episode in a new series devoted to an entirely new book: “The Science of Can and Can’t” by Chiara Marletto. Get the book anywhere ebooks are available (as of May, 2021) and learn more about Chiara and her work here: https://www.chiaramarletto.com​ This book is an amazing work. It presents for the lay reader an introduction to “Constructor Theory” without losing any scientific or philosophical rigour. In this first episode, I explain the motivation for Constructor Theory as a departure from the traditional conception of physics as being about “dynamical laws”. For the first time in science, Constructor Theory attempts to provide a way of creating physical theories about counterfactuals. We go some way to exploring what a counterfactual is and at this early stage of the series outline a sketch of where the constructor theory approach may be found useful. This episode constitutes the first part of chapter 1. It covers some of the philosophy of counterfactuals and the application of constructor theory to epistemology. Discussion of the physics will be left to episode 2.

In this second part I spend a large portion of our time comparing author John Horgan's work "The End of Science" to David Deutsch's "The Beginning of Infinity". What errors does Horgan make on the way to reaching the conclusion that science is coming to an end? I also summarise cases where critics of Popper seem to turn to character assassination rather than being focussed on his ideas. We end by considering reasons why - particularly in fundamental physics - science is not at an end given open questions especially in cosmology. Consider becoming a supporter of the podcast by subscribing through either of my Patreon pages. For a "per episode" donation here: https://www.patreon.com/tokcast or a "per month" donation here: https://www.patreon.com/BrettRHall or go here http://www.bretthall.org and click on the yellow "Donate" button to make a one-off Paypal donation. Any and all contributions are highly appreciated.

This episode is identical to episode 59 - only it contains no music. I don't think this is as good :) My preferred way to experience this is the video version version which is here: https://www.youtube.com/watch?v=zpTxBkmr4LE . of this video (there is another published alongside this without any music -again, I don't think it is as good, but if you prefer "no music" - there is a video version without that also here: https://youtu.be/Ky4vMllidvM​ In either case this episode seeks to answer the question "What is a person?" in the context of our best scientific and philosophical understanding of evolution by natural selection, the theory of computation (including quantum computation), the theory of epistemology - how knowledge is created - and finally quantum theory - in particular the Everettian multiverse understanding of it in its most modern incarnation, as explained primarily by David Deutsch in "The Beginning of Infinity" and invoking the concept of fungibility. The concept of "personhood" has been historically a very tricky idea; either mired in the murky waters of mysticism, or reduced by the near vacuousness of physicalism. This document attempts to provide a video essay on the topic given our most up to date notions of what is true in philosophy, mathematics, morality, epistemology and physics. Time stamps will be available soon. Credit for the music goes to “Ketsa” - https://ketsa.uk/​ where their music can be downloaded for free on a Creative Commons License here: https://freemusicarchive.org/music/Ketsa​ and my own track breakdown is as follows: Track List and Times Save Ourselves (00:05​) Deliverance (03:02​) Astral Travel (06:22​) Blazing Stars (09:42​) Blessed Time (12:54​) Dancing by Twilight (38:30​) Wild Rivers (41:46​) Hear me out (44:42​) Gilded Moon (48:27​) Deep Math (53:58​) Built from Nothing (57:11​) Details for the creative commons license can be found at https://freemusicarchive.org/music/Ketsa​ and at the end of the video.

My preferred way to experience this is the video version version which is here: https://www.youtube.com/watch?v=zpTxBkmr4LE . There is another version also published alongside this without any music - I don't think it is as good, but if you prefer "no music" - there is a version without that here: https://youtu.be/Ky4vMllidvM​ Note that episode 60 of the podcast is just "Episode 59 without the music" as well. In either case this episode seeks to answer the question "What is a person?" in the context of our best scientific and philosophical understanding of evolution by natural selection, the theory of computation (including quantum computation), the theory of epistemology - how knowledge is created - and finally quantum theory - in particular the Everettian multiverse understanding of it in its most modern incarnation, as explained primarily by David Deutsch in "The Beginning of Infinity" and invoking the concept of fungibility. The concept of "personhood" has been historically a very tricky idea; either mired in the murky waters of mysticism, or reduced by the near vacuousness of physicalism. This document attempts to provide a video essay on the topic given our most up to date notions of what is true in philosophy, mathematics, morality, epistemology and physics. Time stamps will be available soon. Credit for the music goes to “Ketsa” - https://ketsa.uk/​ where their music can be downloaded for free on a Creative Commons License here: https://freemusicarchive.org/music/Ketsa​ and my own track breakdown is as follows: Track List and Times Save Ourselves (00:05​) Deliverance (03:02​) Astral Travel (06:22​) Blazing Stars (09:42​) Blessed Time (12:54​) Dancing by Twilight (38:30​) Wild Rivers (41:46​) Hear me out (44:42​) Gilded Moon (48:27​) Deep Math (53:58​) Built from Nothing (57:11​) Details for the creative commons license can be found at https://freemusicarchive.org/music/Ketsa​ and at the end of the video.

The beginning of "The Beginning" which is the chapter at the very end of "The Beginning of Infinity". :) Ignore what I say early on in this episode: this is episode 58, not 57. In this episode we revisit the idea that science, or knowledge broadly is coming to an "end". Even Feynman could become uncharacteristically pessimistic in this regard. Every new discovery reveals that there is more to know. Popper himself thought that as we increased our knowledge we would learn how much more ignorant we were - but that this has deep consequences for relating to each other. This is not the beginning of the end, but it may be the end of the beginning of The Beginning of Infinity. Support me monthly here: https://www.patreon.com/BrettRHall​ or per episode here: https://www.patreon.com/tokcast​ or even a one off donation by clicking on the "Donate" button found here: http://www.bretthall.org/​

This is a podcast all about "Existential Risk". Made at the request of a Patreon, I cover the usual spectrum of ways in which people guess civilisation might end, discuss how to think about this from a rational - but critical - perspective and how to remain optimistic in the face of public intellectuals bombarding us with these claims about the coming end-times. If you would like to get early access to podcasts like this, consider becoming a Patreon either at https://www.patreon.com/tokcast (for per-episode support) or https://www.patreon.com/BrettRHall (for per-month support).

The final part of the penultimate chapter. Here we cover "The parable of Europium" and other memorable pessimists from David's formative years. Some analysis of the present concerns about climate change and the rational problem solving - and optimistic approach as contrasted to the standard pessimistic lines.

What does it mean for something to exist?

Marx, Engels and Diamond present to us a vision of people as being in some sense impotent in the grand historical scheme - subject merely to natural forces and thus able to be predicted by a kind of natural law. This reductive view of people and their place in history (and the cosmos) leads to terrible historical ideas that bleed into pessimistic political ideologies. The truth instead is not bleak. People - in the form of their creative capacity to explain the world in which they find themselves leads to them being shapers of history. They are agents of change: powerful and good. We are reaching a crescendo of "The Beginning of Infinity".

This is additional material about Chapter 6 of "The Beginning of Infinity" - but goes into some additional areas. I compare Greek Gods to Blockchain (in a sense). I think "The Jump to Universality" is a particularly poorly understood chapter. I hope this inspires many to go back and re-read that part of the book. Again. And again.

Easter Island, Incans, Llamas and Australia. Resources and knowledge, creativity and stasis. We begin to bring together the chapters that have come before as we move into the crescendo of "The Beginning of Infinity". Images (on Youtube) all used under a creative commons licence. All music composed by me.

What does the watchword of today "sustainable" really mean when taken seriously? In this episode we compare two titans of science communication: David Attenborough and Jacob Bronowski - for although they have inspired generations of scientists and those interested in science, their underlying philosophies could not have been more different. What are those philosophies and what consequences could they have if they were to drive actual policy? Also - a diversion on aspects of Australian and British history.

The 50th episode! This is the third part (given there was a part 0, introduction) referring to chapter 16 of "The Beginning of Infinity" with substantive readings. We get into how memes evolved in non-human animals and then how these memes, and genes at some point allowed for a jump to universality. Specifically the universality of explanatory knowledge - which is a quality of a special kind of software - that which runs on our brains, or otherwise known as "a person's mind".

What it says in the title :) A short and sweet introduction to a particular way of thinking and knowing. This is all about fallibilism and the possibilities that being wrong opens up.

This episode is highly visual and better viewed on Youtube here: https://www.youtube.com/watch?v=VlcQ4ZFKrKk However, the substance is still there in this purely audio-only version. This is another episode not primarily about "The Beginning of Infinity" but it is deeply inspired by it. It is a discussion exploring the "resources" debate. Are resources finite or infinite? I look at the intersection between economics and cosmology or people and the universe. So this is all about how knowledge changes physical reality, or as David Deutsch has said: how explanations transform the world.

A ToKCast Special: Brett talks about what he's learned over the years from various academics about the question of alien life. Although I don't mention it, I draw my inspiration from an academic paper I wrote years ago as part of my Masters degree in Astronomy - it can be found here: The Rare Earth That might be a bit more sober, hard-going and not exactly entertaining. I hope this video is fun. I don't read - I simply talk. It's a somewhat different style for ToKCast.

This is the second part (after a part 0, introduction) referring to chapter 16 of The Beginning of Infinity with more substantive readings. We get into imitation and compare how apes "ape" and parrots "parrot" to what humans are doing when they learn. Meme replication and lyrebirds make an appearance.

This is not a regular episode - and if you have listened to episode 44 you do NOT need to listen to this because it is simply excerpts from that episode. It is simply an extraction from that episode of the material - solely my remarks rather than any reading - about the concept of "free will". The following is the Youtube description of this episode: This is an excerpt from https://www.youtube.com/watch?v=Oypz57aosnE but is focussed on my remarks about "free will". This is my best attempt at a response to Sam Harris or "CosmicSkeptic's" video here https://www.youtube.com/watch?v=Dqj32jxOC0Y It seems to me almost every public intellectual, more or less (Daniel Dennett aside) is allergic to the notion of "free will" because they guess it must be linked to some supernatural notion or must defy physics or is in some other sense irrational. I try to explain the scientific notion of the little we know and advance the case that a denial of free will simply moves the same mystery - the same problem - elsewhere.

Early on in the episode, I wrongly refer to this as "Episode 43". It's not: it's episode 44. This particular episode is largely about the concepts underpinning chapter 16 - with very little reading (I get through the first page or so). We explore creativity, choice and the associated "mysteries" (or problems of) consciousness and free will. Are these all facets of the same underlying - deeper truth - about personhood? This is one of those episodes with a couple of references to what is going on in the video version of the podcast...but I think most people will have sufficient imagination to guess what is going on :)

This is the third in a 3 part series devoted to Chapter 15 of "The Beginning of Infinity" by David Deutsch. All about "The Evolution of Culture", in this part we are looking at the conditions under which a dynamic society can gradually evolve and persist. Importantly we distinguish between rational and anti-rational (not merely irrational) memes.

This episode is not about "The Beginning of Infinity". It is largely a reading of an article that can be found on my website at http://www.bretthall.org/blog/an-autobiography-of-wealth The purpose of that article and this episode is to discuss the pervasive claim that the middle classes have seen a stagnation in "real wage growth". I do not go deep into economic matters but rather take a personal perspective which, I would guess, is applicable to almost anyone.

In this episode I cover more of David Deutsch's contributions to philosophy. In order these are: 1. The true function of evidence in science 2. How the quantum multiverse is a testable theory 3. All evils are due to insufficient knowledge and how morality is about "What to do next". 4. The mathematician's misconception (i.e: that mathematical proof is independent of the known laws of physics).

This is part 2 of my introduction to Popper series. Here I cover 1. The concept of "conjectures" 2. Common Sense 3. Realism 4. The bucket and the searchlight 5. Debating definitions Yes. It's only 2 episodes in, and I have violated my self-imposed 10 minute limit rule. But I think it was worth it, rather than splitting these in two. To support this podcast, visit https://www.patreon.com/BrettRHall to make a monthly donation or https://www.patreon.com/tokcast to contribute per episode. Thank you kindly to all donors.

This is the second in a 3 part series devoted to Chapter 15 of "The Beginning of Infinity" by David Deutsch. All about "The Evolution of Culture", in this part we are looking at the causes of a static society: that rule (rather than the exception) about progress coming to a halt in human communities. We follow on from part 1 in looking at how memes get replicated and how different kinds of memes have different effects upon their holders the the wider society.

This is the first in a 3 part series devoted to Chapter 15 of "The Beginning of Infinity" by David Deutsch. All about "The Evolution of Culture", in this part we are looking at the notion of a meme and consider under what conditions ideas replicate. As we touch upon: this is a question of civilizational consequence as it is related to the ability of a society to break out of being "static" (one with little to no progress) and become a modern "dynamic" one (where progress is unbounded).

A very brief, and personal, introduction to the philosophy of Karl Popper and David Deutsch. Note that the Youtube version of this exists in 3 parts, each of which has visuals that may help some with the explanations.

This is some commentary upon a recent debate Douglas Murray was engaged in - which can be found here: https://www.youtube.com/watch?v=i3sSnmq9uKU It is, broadly speaking, an excellent encounter, modulo - as Douglas rightly observes - the tendency for his interlocutor to resort to insults or other ad hominem remarks. I reflect on Douglas' position (with which I largely agree) and attempt to connect his remarks to some underlying modern philosophy. (Modern, I hasten to add, not "postmodern"!).

Audio listeners, please note: This episode contains a lot more visuals than my usual podcasts. As always this can be found on Youtube at https://www.youtube.com/watch?v=gWZ4GcRd-_8 if you want the full experience. I'm referring to images and so on throughout, or the images are illustrating what I am saying without comment. In this chapter we counter a number of prevailing views about the arts: the purposes of art and the possibility of objective standards of beauty. This leads to a discussion of the place of inexplicit knowledge when creating in the arts and how the "hard to vary" quality of explanations finds an analogue in the art. All of this discussion comes through the lens of beauty in nature and how flowers evolved to be attractive. But this attractive quality of flowers is not a mere matter of opinion for both insects and people find flowers attractive.

This is some reading and reflections upon chapter 13 of "The Beginning of Infinity". In this second part we consider criteria for democracy and democratic institutions. I take a deep dive into Popper's own writings on the topic to supplement the material in David's book. There is even, what we might call, some "self help" when it comes to making choices, or making better choices, or cultivating a better approach to problem solving when no option seems viable. Popper's article on democracy can be found here: https://www.economist.com/democracy-in-america/2016/01/31/from-the-archives-the-open-society-and-its-enemies-revisited

This is the first episode of 2 parts all about chapter 13 "Choices" from "The Beginning of Infinity" by David Deutsch. Here we take a deep dive into voting systems and what this means for decision making more broadly: both as societies and individuals. Logic and fairness seem to come in conflict if we become reductionist and turn only to mathematics in order to make rational choices. As always the "David Deutsch" take on what might otherwise seem to be a parochial issue turns out to have civilisation level consequences.

This is the third episode in a 3 part series about chapter 12 of "The Beginning of Infinity". This part is focussed in a more specific way on bad science (that being explanationless science). We also delve into the nature of personhood once more, its moral significance and the possibility of having an experience as a human animal versus a non-human animal.

This is the second episode in a 3 part series about chapter 12 of "The Beginning of Infinity". Here we get into some of the connections between poor "interpretations" of quantum theory and relativism.

This is the first episode in a 3 part series about Chapter 12 of "The Beginning of Infinity". As this chapter is about Bad Philosophy, I thought an episode that sets the context - especially the contemporary context - might be timely.

The final part of "The Multiverse" series - and with some discussion (and a story!) of some little known material about how to test "The Multiverse" against other (so-called) interpretations of quantum theory.

With apologies to audio only listeners, this one was up on Youtube for a while (and contains a few visuals) - I simply forgot to upload it to Podbean and Apple Podcasts. It is largely an analysis of common misconceptions about the multiverse and references a conversation between Sam Harris and Bret Weinstein who spoke about the multiverse during a recent conversation.

This is a very brief and non-standard non-Beginning of Infinity podcast. It also does not mention COVID-19 at all. It is inspired in part by some remarks made by Yaron Brook. There is an important post associated with this episode which appears here: http://www.bretthall.org/blog/mainstream-morality As with my last episode, we will return to the usual programming soon.

This is a non-Beginning of Infinity Podcast. While it makes some references, as always, to the work of David Deutsch, it is primarily some thoughts about finding ourselves in a given problem situation and what we need to find our way out in time. Of course there is some reference made to the present COVID-19 situation. A rather different episode to the usual. I hope to get back to regular programming soon. Includes also: some response to Sam Harris "Making Sense" podcast on April 16 2020. And some explanation for the BoI "hiatus" (essentially that my studio is presently a "home office"). I hope it's still worth your time :)

Some readings and remarks about David Deutsch's "The Beginning of Infinity" Chapter 11 "The Multiverse". This is the 3rd episode in this series. As with some of the others, audio only listeners may miss a few visuals in this one...but they're not absolutely crucial this time around. There is a way to support this endeavor on my website www.bretthall.org where you can click the donate button and contribute one time, or monthly. Thank you :)

This is the first episode that includes reading from Chapter 11 of "The Beginning of Infinity" about "The Multiverse". It is less edited...and rather more conversational. Compare this to episode 23 and let me know what you prefer. I will take on board comments moving forward. Thank you. As always, donations are welcome at www.brethall.org on the "donate" button.

This episode is an introduction to chapter 11 from "The Beginning of Infinity". While there are no readings from the book this time around, there are readings from "The Fabric of Reality". Audio only listeners should be aware that there is a significant visual component of this episode: animations, diagrams and so forth.

This is not a regular ToKCast (about a chapter from "The Beginning of Infinity"). Instead it will serve in part firstly as a stand alone episode about an esoteric piece of epistemology: what is the function of the experiment in the natural sciences? (As explained by David Deutsch in his paper "The Logic of Experimental Tests particularly Everettian Quantum Theory"). I make many remarks - including many new remarks. The final third or so of this episode is largely devoted to a defense of Popper broadly and his criterion of demarcation in particular. Secondly this episode is like an "episode 1a" of Chapter 11 "The Multiverse". This episode contains some useful material for anyone interested in "the quantum multiverse" and its testability. Spoiler alert: it's testable, no matter what others say. Sources: You can find David's Paper "The Logic of Experimental Tests" here My exposition of that paper is here: http://www.bretthall.org/philosophy-of-science.html You can download a free pdf copy of Popper's "The Logic of Scientific Discovery" here (it's well and truly out of copyright, so feel no guilt about the download!)

In this, the second episode covering Chapter 10 "A Dream of Socrates", we encounter Plato in dialogue with Socrates. An attempt is made to learn epistemology from Socrates by Plato. Epistemology is applied to political institutions and the concept of dynamic and static societies is explored and we get our first sense of what anti-rational memes are about (though this terminology is not yet being used). In the second half I compare and contrast kinds of democracy.

In this, the first episode covering Chapter 10 "A Dream of Socrates", we explore epistemology directly. Hermes comes to Socrates in a dream (or somehow!) and uses a quite "Socratic Method" to draw out Popperian epistemology from Socrates. Empiricism is refuted and the correct way knowledge is guest and criticized to improve it discussed.

An irregular episode barely touching upon "The Beginning of Infinity". Somewhat self-indulgently, and purely for my own fun, I take a lesser-known Popper paper - found here http://www.bretthall.org/the-nature-of-philosophical-problems.html and provide lengthy commentary upon it with some remarks about its significance for some contemporary issues.

In this, the final episode covering Chapter 9 Optimism, we explore optimism as applied to politics and institutions. A pessimistic view of people, as animals that sometimes cannot be reasoned with, would imply the initiation of force is required. But understanding people as beings of compassion and reason means we should initiate kindness and use force only ever in response to violence. Pessimism about problems - problem avoidance is something we should not only take seriously but personally as David argues in this chapter. Because if optimism was not repeatedly stamped out or required the intellectual energy to constantly defend, we would be immortal already and living among the stars.

In part 2 on Optimism, we explore the implications of David Deutsch's philosophy for individuals and institutiuons. Given people are the agents that create knowledge - the solutions to problems - what moral stance should we take with respect to them? How will this affect our future and what threats to optimism still exist in the contemporary zeitgeist?

This is the first of a 3 part series on chapter 9 of David Deutsch's "The Beginning of Infinity". Chapter 9 is titled "Optimism" and the week this is published marks the 50th anniversary of the first steps taken by humans on the moon. If we choose to continue to pursue solutions in an open ended way - if we choose to embrace what might be called "Deutschian Optimism" then next it can be Mars...and after that the stars.

Note that this one is not primarily about a chapter from "The Beginning of Infinity". Some remarks on Sam Harris position on "Free Will" as articulated in his book of the same name. I do mention BoI and FoR of course and borrow heavily from David's work in constructing the arguments herein. Most especially the "Copper Atom at the tip of the nose of the statue of Winston Churchill in Parliament Square" argument. An argument that I think deserves a label shorter than that because it deserves to be remembered.

Unlucky 13: The microphone failed for this one, so the backup audio has been used. It's a little sub par but still "listenable". The next one sounds better. Note to audio-only people: some visuals are in this one - so you can find that on Youtube.