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RobinHanson's avatar

That is more a clue to what the rule must be than to how that rule actually comes about mechanically.

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Wei Dai's avatar

One clue to the mystery of the Born rule is that evolution of a wavefunction only preserves its 2-norm, so under a probability rule with any exponent not equal to 2, you'd be able to solve problems in PP in polynomial time using post-selection. See Scott Aaronson on Born Probabilities where I tried to explain this result and how it might solve the mystery, or see Scott's original paper.

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