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The True Limits of What’s Possible — Drawing from David Deutsch

The True Limits of What’s Possible — Drawing from David Deutsch

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 In this episode, we explore the limits of reality—not as reasons for pessimism, but as the best explanations we have for what truly cannot be done. Drawing from David Deutsch, I explain 1) the laws of physics, 2) unpredictable actions caused by quantum fluctuations, 3) the unknowability of future knowledge and technologies, and 4) intractable problems that require resources we don’t yet have. The key takeaway is hopeful: anything that doesn’t violate these limits is possible, and human creativity can always find a way forward.Timestamps00:00 Intro01:01 Limit 1: The Laws of Physics02:23 Limits due to a lack of knowledge03:10 Limit 2: Unpredictable actions06:09 Limit 3: Unknowability08:31 Limit 4: Intractable actions10:35 Optimism and the Potential of Human Creativity11:53 Constructor theory12:44 OutroFeatured linksThe Science of Can and Can’t (Popular science book on constructor theory): https://www.chiaramarletto.com/books/...Constructor Theory of InformationDavid Deutsch, Chiara Marletto: https://arxiv.org/abs/1405.5563Constructor theory of time David Deutsch, Chiara Marletto: https://arxiv.org/abs/2505.08692The Fabric of Reality (Chapter 9): https://www.daviddeutsch.org.uk/books...My upcoming book: https://edwindoit.com/4actsMore from meBook: https://edwindoit.com/4actsWebsite: https://edwindoit.comNewsletter: https://edwindoit.substack.comProductivity blog: / edwindoit X: https://x.com/Edwindoit
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