On 21 Nov 2017, at 06:22, Bruce Kellett wrote:
On 12/11/2017 4:34 am, John Clark wrote:
The title of this thread is about the consistency of Quantum
Mechanics, but far more important than QM is the ability of ANY
theory to be compatible with experimental results, and one of those
experiments shows the violation of Bell's Inequality. And that
violation tells us that for ANY theory to be successful at
explaining how the world works AT LEAST one of the following
properties of that theory must be untrue:
1) Determinism
2) Locality
3) Realism
You have repeated this claim several times, John, but it is not
strictly true. Maudlin summarizes it like this:
"Early on, Bell's result was often reported as ruling out
determinism, or hidden variables. Nowadays, it is sometimes reported
as ruling out, or at least calling in question, realism. But these
are all mistakes. What Bell's theorem, together with the
experimental results, proves to be impossible is not determinism or
hidden variables or realism, but locality, in a perfectly clear
sense. What Bell proved, and what theoretical physics has not yet
properly absorbed, is that the physical world itself is non-local."
This is from the article Stathis pointed to: Tim Maudlin, arxiv:
1408.1826 He says the same thing in his book and numerous other
articles where he spells this out in considerable detail.
I read his book. It seems to me that he is aware that this works
clearly only if we assume that measurement have definite outcome, and
that it does not apply in the MW view. He is rather explicit on this
in his book. Stathis' quote seems to assess this. I am not sure
quantum field theory would make any sense with existing physically non-
local phenomena. That is why also Bernard d'Espagnat distinguished non-
separability, and non locality, to avoid a possible confusion between
non-local appearances and action at a distance.
Bruno
Bruce
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