On 2/22/2020 2:39 PM, Bruce Kellett wrote:
On Sun, Feb 23, 2020 at 9:23 AM 'Brent Meeker' via Everything List
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<mailto:everything-list@googlegroups.com>> wrote:
On 2/22/2020 2:10 PM, Bruce Kellett wrote:
On Sun, Feb 23, 2020 at 7:17 AM 'Brent Meeker' via Everything
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<mailto:everything-list@googlegroups.com>> wrote:
But isn't that just a matter of it's proponents overselling
it. If you say, well it's a probabilistic theory, then that
the Born rule is the way to get a probability is fairly
compelling.
Many-world proponents certainly oversell Everett. I have not seen
anybody admit openly that there is a problem with getting
probability into a deterministic theory so it just has to be put
in by hand. If, as you say, people admit that what they really
want is a probabilistic theory, even if they have to force it in
by hand, then at least some of the arguments for the Born rule
make sense. But if you insist that your theory is pure
SWE/Everett, then all attempts at deriving the Born rule from
this deterministic position fail.
The arguments that I have developed here, based on Kent's
insight, take Many-worlds at face value. Then the theory is
clearly incoherent, or at least incompatible with observation.
However, if you take a classical deterministic theory, such as
Bruno's WM-duplication thought experiment, then there is no way
you can sensibly interpret such a theory probabilistically.
You don't think copying of persons has a probabilistic implication
for copies?
Only if you say so. The trouble, as I have pointed out, is that if
they estimate their probabilities on the basis of the data they each
collect from repeated trials, they all come to different answers. And
all of these answers are equally justifiable. The concept of "a
probability" in this situation is valueless.
You're still assuming that there is no statistical convergence in the
MWI answers, as is assumed in one world?
Brent
The duplication case is similar to the question Carroll poses: "What
branch will I end up on?" A question he rightly dismisses as misguided.
Bruce
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