Chance in Physics
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All quantum theories have one thing in common: they agree that chance (or randomness) should feel at home in the theory. It is sometimes claimed that quantum randomness, or equivalently quantum probability, is irreducible, by which it is meant that there is just no way out of it. Quantum mechanical probability is expressed in Born’s statistical interpretation of the wave function and this is frequently taken as an axiom. Then nothing more can be said, unless one feels unhappy about the axiom. And indeed, there are reasons for not being happy about it.