On Sun, Dec 3, 2023, 4:40 PM Brent Meeker <meekerbr...@gmail.com> wrote:

> I don't think the Born rule is implied by MWI; but it's already known to > be the only rational way to define a probability measure on a Hilbert space > (Gleason's theorem). So in a sense it's implicit in QM regardless of > interpretation. > > QBism, which is a version of CI+decoherence is at least as rational as > MWI. I think the proper measure of an interpretation is whether they > suggest improvements and experiments. MWI may be better in that respect. > QBism, like other non-realist theories, can't account for the effectiveness of quantum computers (unless one believes that non-real things can have real, detectable effects (like producing the solution to factoring a large semiprime)). But if you are realist about the wave function, then you are dealing with MW, not QBism. Jason > Brent > > On 11/29/2023 4:00 AM, John Clark wrote: > > On Tue, Nov 28, 2023 at 7:30 PM Brent Meeker <meekerbr...@gmail.com> > wrote: > > *> MWI fans assert that it is superior because it doesn't assume the Born >> rule, only the Schroedinger equation. I wouldn't claim that the (modern) >> version of Copenhagen is superior to MWI, I'm just unconvinced of the >> converse.* > > > A pretty convincing argument can be made that if the Many Worlds idea is > true then the Born Rule must have the ability to predict the most probable > outcome of any quantum experiment and as an added bonus, unlike its > competitors, it can do so without adding any random elements. However I > admit nobody has ever been able to prove that Many Worlds is the only > possible explanation of why the Born Rule works, and we already know from > experiments that it does. Put it this way, if Many Worlds is true then the > Born Rule works, and if the Born Rule works (and we know that it does) then > Many Worlds MIGHT be true. But that's still a hell of a lot better than any > other quantum interpretation anybody has managed to come up with, at least > so far. I'm not certain Many Worlds is correct, but I am certain its > competitors are wrong, or so bad they're not even wrong. > > And as far as assumptions are concerned, every scientist, not just > physicists, has no choice but to assume that probability must be a real > number between zero and one, and all the probabilities must add up to > exactly one for any given situation, because otherwise the very concept > of probability would make no sense. And we know that taking the square root > of the absolute value is the only way to get a number like that out of a > complex function like Schrodinger's wave equation. If Many Worlds is > true, and If each version of Brent Meeker makes bets In accordance with the > laws of probability so derived, then more Brent Meekers will make money > by following the advice given by the Born Rule than if they followed any > other betting strategy. Yes some Brent Meekers will still go broke even > if they follow the Born Rule, but most will not. > > John K Clark See what's on my new list at Extropolis > <https://groups.google.com/g/extropolis> > 7ff > > > > >> -- > 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 everything-list+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/CAJPayv00iaJKxfguE7bjmyViNO3nYnCtEaNf9o9fs81yOtAYBg%40mail.gmail.com > <https://groups.google.com/d/msgid/everything-list/CAJPayv00iaJKxfguE7bjmyViNO3nYnCtEaNf9o9fs81yOtAYBg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > 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 everything-list+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/3d467c95-5d40-4552-abd9-9b5736f69ee0%40gmail.com > <https://groups.google.com/d/msgid/everything-list/3d467c95-5d40-4552-abd9-9b5736f69ee0%40gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CA%2BBCJUgA%3DxbyimvnxNUxf9ETaiSy0X%2BE4n4NtNKVw5wiHWCoBQ%40mail.gmail.com.