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Bosons occupy the same quantum states, even if fermions obey Pauli's Exclusion Principle. Heisenberg's Uncertainty Principle rules out determining the quantum states occupied by two close fermions, etc....

I mean to say is it impossible in Quantum Mechanics to trace the history, or follow it, of a boson or fermion? There are inevitable errors. Why are we concerned about the loss of information in a black hole, where degeneracy breaks down? I mean, how are two mysteries different, with respect to conservation of information? We have laws of black hole thermodynamics, which prohibit the loss of energy...


marked as duplicate by Prahar, Floris, ACuriousMind, user36790, John Rennie Jan 19 '16 at 16:07

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