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I just had this argument with this person on another forum and the gist of it was that he was saying collapse is predictable to within a negligible precision if you average out the results a huge number of identical wave-particles that had already collapsed.

My contention was that his claim was hidden variable and violated the uncertainty principle. I further contended that at the very most, all this analysis of already collapsed identical wave-particles could give us is a probability akin to a probability of collapse derived from a specified magnitude of the wave-function, and that this probability is in no way a prediction, as a prediction would mean hidden-variable not uncertainty.

Anyone have an opinion?

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# Hidden variable and the copenhagen interpretation.

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