End of Realism? Experiments Test Quantum Mechanics

[Demystifier]

Perhaps superdeterministic is a bit too strong, but do you at least agree that Bohmians generally do not believe in the free will of the experimenter, even if that is not the reason why Bell's inequality is violated? So in that sense, a measurement was a totally predetermined even in the history of the universe, and thus there's nothing special about contextuality: just like any interaction between particles can can change the states of the particles involved, a measurement of a particle can change its state.

I agree.

As for decoherence, if you truly don't believe in wavefunction collapse, then how is measurement philosophically important? It just so happens that under certain circumstances the wave function gets so smeared out by a large number of particle interactions that it becomes difficult to detect wave properties; who cares?

I care and think it is important philosophically because otherwise you cannot understand why collapse is still a useful concept for all practical purposes, even when it doesn't really exist. (I am not saying that decoherence alone is enough to understand it, but it definitely plays an important role in understanding it.)

 

[Demystifier]

Is this apparent contradiction caused by different definitions?

Even worst, the contradiction is caused by different levels of understanding at different times. When I was writing the older post you quoted, the difference between determinism and superdeterminism was not completely clear to me. In the meanwhile, the difference became much more clear to me:
superdeterminism = determinism + fine tuned initial conditions

 

[_PJ_]

I still firmly beliewve that there is some underlying principle or 'mechanism'involved, some form of 'Hidden Variable', perhaps operating on a higher dimension spatially, where entangled prticles share a spatial coordinate despite spearation on any or all the others. We just lack the means to understand/measure such things at this time.

 

[akhmeteli]

Even worst, the contradiction is caused by different levels of understanding at different times. When I was writing the older post you quoted, the difference between determinism and superdeterminism was not completely clear to me. In the meanwhile, the difference became much more clear to me:
superdeterminism = determinism + fine tuned initial conditions

Thank you