Yes, this is me asking David Deutsch about the supposed "evidence" of UFOs that are the US Military's release of footage from jet aircraft that have become known as "Tic Tacs". I do not mention this in the video, but the best explanation I have seen of at least some of this stuff is by Mick West who was able to reproduce at least some of the images: https://www.youtube.com/watch?v=Le7Fqbsrrm8 Neil deGrasse Tyson also makes broadly similar remarks to David in this podcast with Sam Harris: https://www.youtube.com/watch?v=VBVg5l1Cn6U Whatever the case, the deeper point is the more general one. When we do not know the explanation for a set of observations, then we have a problem. Not a solution. In this case, we seem to have either very prosaic solutions (as Mick West explains - in the form of camera effects) or perhaps something we "don't know". What we do not have is "evidence for" something amazing. Namely alien life visiting us in their spacecraft. The only way "evidence for" actually works is when it *rules out* every other theory. That is, in fact, the purpose of evidence in science. For more on that, see here: http://www.bretthall.org/general-relativity-and-the-role-of-evidence/the-role-of-evidence and here: http://www.bretthall.org/philosophy-of-science.html #Tictacs #UFO ... https://www.youtube.com/watch?v=T54ZbIp9McY

This is some reading and reflections on David Deutsch's "The Beginning of Infinity" Chapter 11 "The Multiverse". It is the 3rd in this series and the 2nd that contains readings from the book. If you would like to support this endeavor my website www.bretthall.org has a donate button or you can contribute via Patreon at https://www.patreon.com/join/BrettRHall? ... https://www.youtube.com/watch?v=1F1CY7uhYK0

All about fine tuning using a specific example to discuss the debate that rages in physics and cosmology on whether the universe was designed, looks designed or is random. Originally from https://youtu.be/3JJ-13IGAzE?si=nAITwlrnuqg_oe5Z #physics #cosmology #philosophy ... https://www.youtube.com/watch?v=TfZ453YmUY4

This is the complete and unabridged discussion I had with David Deutsch largely about "The Beginning of Infinity". It contains all my "Questions for David" - which were published separately - AND much more content too. 00:00 Introduction 12:51 Why aren’t testable theories enough? 14:37 Predictions vs Explanations 18:33 Verisimilitude 23:54 Are people a “chemical scum”? 25:43 The Earth is uniquely suited to life? 30:22 What does “provable” mean? 33:44 Undecidability 37:45 Classifying abstractions 41:29 The nature of physical laws. 47:06 Direct Observation 50:29 The nature of mind 55:40 The Supernatural 59:52 Epistemology and Morality 01:02:00 The physical limitations of knowledge? 01:09:24 Some history of quantum computation 01:16:44 Tic Tacs, UFOs and aliens 01:19:01 Dark Energy Support the podcast by following the links to Patreon or Paypal here: www.bretthall.org ... https://www.youtube.com/watch?v=_pAgz8iVC44