On Wed, May 11, 2022 at 1:25 AM Brent Meeker <meekerbr...@gmail.com> wrote:


>
> * > Well, there's a big fat hint that it [SE] breaks down FAPP in every
> measurement, in every bit of physics that appears classical and
> irreversible. *


The thing is, whenever somebody says FAPP they really don't mean for *ALL*
practical purposes, certainly not if your practical purpose is to probe the
fundamental nature of reality. In classical physics it's not literally
impossible for the scrambled eggs on your breakfast plate to unscramble
themselves before you have a chance to eat them, it's just very very
unlikely. But if Many Worlds is correct then there are either an infinite
number or an astronomical number to an astronomical power number of worlds
where everything that is not forbidden to occur does occur, and one of the
things that is not forbidden to occur is a world in which scrambled eggs
unscramble themselves on your breakfast plate. If something happens a very
very large number of times then even very very unlikely things will happen
in some of them.

*  > And it might just be an effective approximation as in QBism.*
>

QBism is not wrong, it's an effective way to do science if you're only
interested in measurements and in making a new gadget that works and don't
care about what's really going on; the same thing could be said about the
Copenhagen Interpretation, and also for the all time favorite of most
physicists, Shut Up And Calculate. But I find it extremely difficult to
find any significant difference between QBism, Copenhagen and Shut Up And
Calculate.
  John K Clark    See what's on my new list at  Extropolis
<https://groups.google.com/g/extropolis>
suq

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