How does quantum mechanics change our description of reality?

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[Apobothra]

I certainly remember from one book, written by Roger Penrose (if I remember correctly), that the Schrodinger equation, which describes the evolution of a wavefunction, is purely deterministic in its nature. And what gives rise to probabilities is the collapse of the wavefunction.

[jeffrelf]

_ Quantum Correlations are acausal, like a series of dice tosses.
The Correlations say nothing about the next roll of the dice,
but they _can_ tell you that, in 100 tosses,
2 ( snake eyes ) happens less often than 7 ( 3 + 4, 1 + 6, etc. ).

Intrinsically, each toss is fully causal, not random.
SemiRandomness is SemiIgnorance, nothing more.