00:00 Introduction 08:03 Interview Begins 09:42 How Chiara found herself at the foundations of physics 15:30 How Chiara found Everett 19:13 No Special Physics is required for Observers 21:02 What is a counterfactual? How is it linked to a constructor? 29:05 What is (classical) information? How is it different to quantum information? 32:30 Quantum Information is more constrained. This makes it more powerful. 34:08 Is the universe made of information? 38:04 The Simulation Hypothesis 40:33 The...

The certainty of mathematics and its place in the supposed hierarchy of subjects (assumed to be above science which is itself above philosophy in turn). Some more remarks on Bayesianism and somehow ghosts and alien life.

Everything and more one might ever want to know about the topic...that other epistemology people often talk about. The central project is to distinguish between 4 "species" of what is often called "Bayesianism"  1. Bayes' Theorem. 2. Bayesian Statistics. 3. Bayesian Reasoning 4. Bayesian Epistemology.    Actual timestampes and chapters are:   00:00 - Introduction to this podcast 02:55 Epistemology  11:30 Substrate Independence 12:30 Inexplicit Knowledge/Knowledge without a knower 21:30...

This episode is an introduction to the chapter. Although there are some readings, they are limited and I provide context by diving deep into David's more recent work on all this. Specifically we go through the connection of Chapter 10 here (published in 1997) and Chapter 5 "The Reality of Abstractions" from "The Beginning of Infinity" (published in 2011) and then also in light of David's recent speech given at his Dirac Medal award ceremony (published in 2017) - here is the timestamped link...

Commentary (and Explainer) This podcast is largely an op-ed about the "feminisation" of Western militaries and the effect of so-called "diversity, equity and inclusion" ideologies on modern defence forces. I look at what the purpose of a military is and the tension between its aims and the ways some arms of some defence forces are "marketing" themselves to their own people. Of chief concern to some has been the way the US army has chosen to attempt to recruit people into its ranks....

Very brief readings from and lengthy reflections upon David Deutsch's paper "The Philosophy of Constructor Theory" published here https://link.springer.com/article/10.... and available in full here: https://www.constructortheory.org/por... #physics #knowledge #philosophy #epistemology #daviddeutsch #science Also available on Youtube at https://www.youtube.com/watch?v=hMCx2Com7LU Discuss this or any episode of ToKCast on ToKChat: a channel on "Airchat" available here for download for iPhone...

This is a "return to regular format" episode in one respect - readings from and reflections upon "The Fabric of Reality" but also a departure from regular formatting in another respect: I teach a bunch of simple mathematics. This is for those who might think "quantum computation" and "quantum algorithms" will be forever beyond me. They are not! I begin with (quite literally) primary school mathematics level stuff (what's a prime number, what is the "fundamental theorem of arithmetic") and...

I recommend the version found here that contains visuals and music: https://www.youtube.com/watch?v=mlvgxEBekP4 However the same message will come through on this audio only podcast.   Full Credit for all ideas to: James (Jim) Pierce Naval and Nivi and David Deutsch With mistakes all my own   See also James' website (and relevant article) here: https://www.james-pierce.com/writings/effortless-stoicism His instagram account including the original "Effortless Stoicism" video here:...

This is a cross-post from my Substack podcast "The 3Rs: Reality, Reason, Rationality" the text of which can be found here: https://bretthall.substack.com/p/where-do-ideas-come-from?sd=pf#details   This diagram is also relevant:  

Science news from a "critical rational" perspective. No "believing" in explanations here, no time for instrumentalism and a focus on good explanations of the evidence. Introduction (epistemology in science): 00:00 Dark Matter: 04:32 Modified Newtonian Dynamics (MOND): 08:12 Statistical confidence in physics: 15:23 Instrumentalism in modern physics: 19:00 Fusion Power 'News': 22:09 "Spinoffs" from fusion research: 24:56 Advice for investors in pure science: 28:26 James Webb Space Telescope...

Here in this second-to-last episode on the discussion of Chapter 9 from the Fabric of Reality we discuss some of the key distinctions between the classical and quantum - the philosophical and scientific implications and then some of the current experimental approaches to (and reporting on) the actual engineering of these devices. 

This serves as "part 2" of my "Are Consciousness and Creativity the same thing?" podcast, the Youtube version of which can be found here: https://www.youtube.com/watch?v=lrjY4fR-qMU

This podcast was originally produced on Airchat: https://www.getairchat.com/bretthall/bretthall It is all about an interview that can be found here: https://www.youtube.com/watch?v=4fv4Uz_i1iQ

This podcast episode is based around two sets of chits (two "chats") found on airchat at https://www.getairchat.com/bretthall/bretthall?t=440630 The articles associated with these chits and in the latter case many links are here: https://www.bretthall.org/blog/the-white-swan-and-red-pen and here: https://www.bretthall.org/blog/the-problem-with-fallibilism

The latest on the philosophy, science and technology of AI and AGI. ChatGPT, Deep Learning, Neural Networks and Large Language Models (LLMs). What do we know? Where is it going?

Sam Harris and Lex Fridman vs The Multiverse and Constructor Theory. Although this is a reaction video, it's just 10 minutes of Sam with the rest of the time spent me doing some analysis, dissection and "what went wrong" reflection as a vehicle for explaining certain parts of physics and philosophy.

Everything that we’ve covered on ToKCast so far for those in a hurry or those wanting a refresher. It’s the synecdoche episode. 183 episodes down and David Deutsch has spoken with Naval Ravikant and Tim Ferris, and so begins another cohort of people - a new generation if you like - of people coming to optimism in Deutsch's sense and the infinite potential of people and explanatory knowledge. I begin with some reflections on David’s appearance on The Tim Ferris show. If you watch no other...

What is "St George in retirement" syndrome? This and much more in another random livestream about all sorts.

Thursday 16 March 2023 Livestream - Patreon and Twitter Questions and Science News Articles discussed: JWST news: https://www.space.com/james-webb-space-telescope-star-soon-go-supernova-photos Volcanoes on Venus: https://www.forbes.com/sites/jamiecartereurope/2023/03/15/venus-is-volcanically-active-right-now-say-scientists-using-32-year-old-images/?sh=7e868b8fd11f Plagues in Africa killing amphibian:...

Reading a short chapter from "What's Eating the Universe?" by Paul Davies titled "The Big Bang" - and adding some exposition and commentary. Also: AMA as time permits. As always I do not monetise anything (there are no ads/I get zero income from youtube) - but if you'd like to support me just go to www.bretthall.org and follow the links to donate. Also the "superchat" feature in Youtube is something that would get to me.

Defending reason and rationality via a discussion of material at https://www.ecosophia.net/blogs-and-essays/the-well-of-galabes/the-clenched-fist-of-reason/ after a question from a listener.

I did a livestream on Youtube and this is the audio taken from that. Questions were taken from Twitter and Youtube. The first 20 mins or so of this episode is a response to a question about Sam Harris' recent "Making Sense" podcast featuring Stuart Russell and Gary Marcus called "The Trouble with AI". Then there are questions from all over the place :)

This is the second part of a two part series. Here we focus exclusively upon "It from Qubit" (2002) by David Deutsch as found here: https://www.daviddeutsch.org.uk/wp-co... I read and comment upon the paper, unpacking its significance for physics, epistemology (i.e: the search for good explanations), metaphysics (ultimate reality beyond what science tells us) and compare this vision of reality to alternatives (for example as presented in the "It from Bit" thesis by Wheeler. The Simulator...

This is the first in a two part series unpacking, breaking down, reading, reflecting and commenting upon David Deutsch’s paper “It from Qubit” available here: https://www.daviddeutsch.org.uk/wp-content/ItFromQubit.pdf or here https://philpapers.org/rec/DEUIFQ or even as the chapter of a Barrow and Davies book here: https://www.cambridge.org/core/books/abs/science-and-ultimate-reality/it-from-qubit/BA7B507C25C37B180FC34802555D4423 I will be referring to the Chapter of the book (that matters as...

Here we discuss the inherent differences between classical and quantum physics. Systems representing both can exhibit "unpredictable" behaviour - so what is the difference? In classical physics chaos theory is a genuine phenomena - but only in theory. The real world does not obey classical physics. It obeys quantum theory and there, that kind of "chaos" simply does not happen. The Butterfly effect is therefore false in reality for reasons explained herein. Those classical effects cause...