# Episode 134: The Deutsch Slot Machine

Page: https://stenobird.com/podcast/the-theory-of-anything-859886/episode-134-the-deutsch-slot-machine
Text version: https://stenobird.com/podcast/the-theory-of-anything-859886/episode-134-the-deutsch-slot-machine.md
Podcast: [The Theory of Anything](https://stenobird.com/podcast/the-theory-of-anything-859886)
Published: 2026-02-24T12:00:00+00:00
Episode link: https://podcasters.spotify.com/pod/show/four-strands/episodes/Episode-134-The-Deutsch-Slot-Machine-e3evq74
Audio file: https://anchor.fm/s/14b6fc10/podcast/play/115386020/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-1-12%2F417945851-44100-2-3aab706d70ab1.mp3
Processing state: processed
JSON: https://stenobird.com/v1/public/podcasts/the-theory-of-anything-859886/episodes/episode-134-the-deutsch-slot-machine
Duration seconds: 8620

## Resource

In this video podcast, Bruce makes his boldest statement yet about probability. He dives into David Deutsch’s lecture “Physics Without Probability” —as well as our Episode 100 interview with Deutsch—to unpack the core argument. Bruce carefully works through the mathematical details of Deutsch’s claim that probability is merely a “flat-earth approximation.” As best as he can make sense of it, however, the argument just doesn’t add up. In fact, Bruce concludes that Deutsch’s own reasoning seems to imply that probability is not at all comparable to a flat-earth approximation. From there, he methodically explores whether this long-running debate about probability is really a case of word essentialism—an argument over definitions rather than a substantive difference. He closes with an impassioned plea: if someone out there truly understands Deutsch’s argument, please help him pinpoint exactly where he’s going wrong. ⁠⁠⁠Support us on Patreon⁠⁠⁠

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## Transcript

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