On 7/4/2021 5:17 AM, Tomas Pales wrote:
On Sunday, July 4, 2021 at 1:51:51 PM UTC+2 Bruce wrote:
And in the two-outcome experiment, how do you ever get a
probability different from 0.5 for each possible outcome?
You would seem to be looking for a branch counting explanation of
probability (self-locating uncertainty). But there is no
mechanism in Everett or the Schrodinger equation to give anything
other than a 50/50 split when only two outcomes are possible. This
is wildly at variance with experience.
In the classical example with balls you may have a collection of blue
and red balls so there are only two possible outcomes of a random
selection of a ball: blue and red. This doesn't mean that the
proportion of blue and red balls in the collection must be 50/50. Why
would the proportion of branching worlds necessarily be 50/50 if there
are only two possible outcomes?
It's not that it's necessarily 50/50; it's that there's no mechanism for
it being the values in the Schroedinger equation. In one world A
happens. In the other world B happens. How does, for example, a 16:9
ratio get implemented. There's nothing in Schroedinger's equation that
assigns one of those numbers to one world or the other. You can just
make it an axiom. Or equivalently, if you can show these are odds
ratios, you can invoke Gleason's theorem as the only consistent
probability measure. But all that is extra stuff that MWI claims to
avoid by just being pure Schroedinger equation evolution.
Brent
--
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/44aceed9-5408-9dc0-ebcb-436765a7df23%40verizon.net.