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S12f. Quantum mechanics and dice
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It is frequently held that quantum mechanics makes only statements
about probabilities and not about single events.
This is very strange for a theory that claims to be the foundation
for everything scientifically observable.
According to the probabilistic view, quantum mechanics is incapable
of making any statement about dice that have been thrown already.
Although we can observe with perfect accuracy the value of the throw,
all that traditional quantum mechanics can give is the probability
distribution of the possible values of the throw, if this value were
not yet known.
Quantum mechanics has similar difficulties coping with other
actual events, since it never ever predicts what must happen or what
must have happened, but only gives probabilities.
This is of little consequence for quantities like the value of a
throw of three dice, but is a severe defect when discussing the
trajectories of the planets of the Solar System (for which we cannot
make meaningful statistics), of air planes, or of cars.
Clearly there must be something objective about these, although
traditional quantum mechanical interpretations - taken seriously -
are unable to accont for definite individual events.