On 11/7/2019 1:40 PM, Bruce Kellett wrote:
On Fri, Nov 8, 2019 at 6:35 AM 'Brent Meeker' via Everything List
<[email protected]
<mailto:[email protected]>> wrote:
On 11/7/2019 12:21 AM, Philip Thrift wrote:
On Wednesday, November 6, 2019 at 7:27:32 PM UTC-6, stathisp wrote:
On Thu, 7 Nov 2019 at 11:15, Bruce Kellett
<[email protected]> wrote:
On Thu, Nov 7, 2019 at 11:00 AM Stathis Papaioannou
<[email protected]> wrote:
The universe as a whole is determined in every
detail, and random choice of the observer in
measuring a particle is not really a random choice.
If you believe that, you believe in magic sauce.
It is a consequence of Many Worlds that there is no true
randomness, but only apparent randomness. If Many Worlds is
wrong, then this may also be wrong. Randomness in choice of
measurement is required for the apparent nonlocal effect when
considering entangled particles.
--
Stathis Papaioannou
That's what *Many Worlds* implies.
The mystery is: Why do (according to the science press in the
wake of Sean Carroll's book) so many people think Many Worlds is
a good scientific idea (or the best idea, according to the author).
Because it treats measurement as just another physical interaction
of quantum systems obeying the same evolution equations as other
interactions.
But you can do that (viz. accept that people, and measuring
instruments, and everything else are basically quantum mechanical)
without adopting the "many worlds" philosophy.
ISTM that creates problem for defining a point where one of the
probabilities becomes actualized. MWI tries to avoid this by supposing
that all probabilities are "actualized" in the sense of becoming
orthogonal subspaces. There are some problems with this too, but I see
the attraction.
Brent
Most contemporary physicists adopt such a view of the quantum origin
of everything without taking Bohr's "primacy of the classical"
seriously. So this is not a sound reason for adopting many worlds.
Bruce
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