From: *Bruno Marchal* <[email protected] <mailto:[email protected]>>
On 1 Aug 2018, at 21:12, Brent Meeker <[email protected]
<mailto:[email protected]>> wrote:
Indeed. But the common-cause explanation doesn't work for all
choices of measurement angle.
It does. Well, it does not if you assume only one Bob and Alice, but
the whole point is that it does if you take into account all Alices
and Bobs in the multiverse. QM explains why in all branches, Alice and
Bob will see the violation of Bell’s inequality, and this without any
physical instantaneous causality on a distance. The MW theory is NOT
an hidden variable theory in the sense of EPR or Bohm. The MW theory
is based on the first person indeterminacy, and illustrate the first
person plural aspect (contagion of duplication). Hidden variable
theory in the sense of de Broglie, Böhm, or Einstein incompleteness
are pure 3p theories, not involving the role of the person in the picture.
In that case you have a different theory, which is not quantum
mechanics. You can believe anything you like about your own private
theories, but you cannot expect others to join in. If we are talking
about quantum mechanics, then it would be polite to stick to that theory.
Bruce
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