On Tue, Nov 22, 2022 at 11:08 AM Brent Meeker <[email protected]> wrote:
> He's wrong that frequentism does not empirically support probability > statements. He goes off on a tangent by referring to "other gamblers". > Nothing in physics is certain, yet Deutsch takes a bunch of definite > assertions and claims they alone are the real physics. > His critique of frequentism is just a recap of arguments that are well known -- you cannot ground probability theory in frequentism, or the idea that probabilities are nothing more than ratios of long-run frequencies. Long-run frequencies might approximate the probabilities, but they cannot be used to ground probability theory -- for well known reasons. I agree that he goes off on a number of irrelevant tangents, and he is wrong to suppose that frequentism is a main-stream theory of probability (at least, these days). Bruce On 11/20/2022 4:28 PM, Bruce Kellett wrote: > > On Mon, Nov 21, 2022 at 2:52 AM smitra <[email protected]> wrote: > >> Probability cannot be a fundamental concept in physics as explained >> here: >> >> https://www.youtube.com/watch?v=wfzSE4Hoxbc > > > I'm afraid Deutsch is a bit too glib in this lecture. He hasn't, despite > his best efforts, removed probability from physics. For example, in quantum > mechanics, he has not explained why, if one measures the z-spin of a > spin-half particle prepared in an eigenstate of x-spin, one gets only one > result -- either z-spin-up or z-spin-down. If one has eliminated > probability, one should be able to explain which result one gets, and why. > It is no solution to say that with many-worlds, that both results are > obtained by disjoint copies of the experimenter. The experimenter is just > one copy, and one would have to explain the result for each individual > separately. Many worlds does not explain why I, for example, see only > z-spin-up and not z-spin-down. To make sense of that, we need a viable > concept of probability and the Born rule. > > Bruce > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLQgSxrbySZNq-1HOFOu_7aie5y3Av3bMcYvB0Gp7hyBHg%40mail.gmail.com.
