On 11/21/2017 2:36 PM, John Clark wrote:
It certainly seems to me, and Maudlin gave me no reason to think
otherwise, that if things are not realistic, if a photon is neither
horizontally nor vertically polarized until I measure it, if things
don't fully exist till I observe it them
,
then things can be local, although I would be unable even in principle to
determine
with 100%
certainty
what
the
electron will do because that depends on what I do and I won't know
what that is until I do it.
"Realism" seems to be used to mean two different things. One, is that
everything with a measurable attribute has a specific value of that
attribute before it is measured. The other is that if two experimenters
perform the same experiment they will observe the same thing regardless
of what they think. If the world is not deterministic this "same thing"
may be a probability distribution instead of a single value. The first
is inconsistent with QM unless you expand the meaning of "thing" to be
the wave function or Hilbert space ray and "specific value of attribute"
to mean "specific probability distribution of an attribute".
Brent
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