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Dec 6, 2019 at 3:22 comment added user21820 Besides what @R.. says, there is also pilot-wave theory that is not excluded by QM and could be argued to be a kind of (non-local) hidden variable theory.
Dec 4, 2019 at 4:37 comment added R.. GitHub STOP HELPING ICE @Michael: Any local hidden variable theory. Nonlocal hidden variable models are trivially compatible with QM.
Dec 4, 2019 at 4:03 comment added Daniel R. Collins The linked article (under "Metaphysical aspects") includes a reference that non-local hidden variables are still considered viable in the form of De Broglie–Bohm theory.
Dec 3, 2019 at 22:54 comment added Michael @CarloBeenakker, Bell's inequality establishes that any hidden variable theory is necessarily incompatible with QM, and therefore eliminates the possibility that such theory would complete/supplement QM as QM stands. This killed the efforts to explain QM via hidden variables. The experiment, performed much later, only determines which of the now incompatible theories models the nature better.
Dec 3, 2019 at 22:34 comment added Carlo Beenakker isn't it the experiment that measured the violation of Bell's inequality the thing that eliminated hidden variable theory? Bell's inequality by itself does not rule out that theory.
S Dec 3, 2019 at 21:55 history answered Michael CC BY-SA 4.0
S Dec 3, 2019 at 21:55 history made wiki Post Made Community Wiki by Michael