"The philosophical moral behind my question is this: once you give up the distinction between actuality and possibility—as the Many Worlds interpretation in effect does, by postulating that all the quantum mechanical possibilities are actualized, each in its own physical universe—once you say that all possible outcomes are, ontologically speaking, equally actual— the notion of ‘probability’ loses all meaning. ‘No collapse and no hidden variables’ is incoherent."
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Hilary Putnam, "A Philosopher Looks at Quantum Mechanics (Again)", The British journal for the philosophy of science 56.4 (2005): 615-634.
https://en.wikiquote.org/wiki/Many-worlds_interpretation
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Many-worlds interpretation
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