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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...

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

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  • $\begingroup$ Welcome to PSE! Please, can you take a look on other questions and Meta? You will find some examples on what kind of questions we accept here and how to state them in a clear way. In this case, can you be more clear? $\endgroup$ – rmhleo Jan 19 '16 at 13:40

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