I don't like to sound glib, but... > In fact, there is no randomness and non-predictability in quantum mechanics. Depends on the interpretation. > wave funct

I don't like to sound glib, but... > In fact, there is no randomness and non-predictability in quantum mechanics. Depends on the interpretation. > wave function collapse in a quantum system is the consequence of coupling the system to a larger, external one that becomes entangled with the "small" quantum system Depends on the interpretation. > we ourselves are described by a quantum wave function Depends on the interpretation. > Different interpretations of quantum mechanics like the "Many Worlds" or the "Copenhague" varieties are basically just arguing about what happens with a wave function after it "collapses". You only really need to worry about "what happens with a wave function" if you have a decidedly psi-ontic view of it. Otherwise, collapse is not itself a physical process. > To my knowledge there is no way to discriminate between different alternatives here The same author recently uploaded a paper which argues that there is a way to discriminate between interpretations based on physical principles. See http://arxiv.org/pdf/1509.03641v1.pdf http://arxiv.org/pdf/1509.03641v1.pdf .