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The symmetrization postulates of quantum mechanics (symmetry for bosons,antisymmetry for fermions) are usually taken to entail that \emph{quantumparticles} of the same kind (e.g., electrons) are all in exactly the same stateand therefore indistinguishable in the strongest possible sense. Thesesymmetrization postulates possess a general validity that survives theclassical limit, and the conclusion seems therefore unavoidable that evenclassical particles of the same kind must all be in the same state--in clearconflict with what we know about classical particles. In this article weanalyze the origin of this paradox. We shall argue that in the classical limitclassical particles \emph{emerge}, as new entities that do not correspond tothe "particle indices" defined in quantum mechanics. Put differently, we showthat the quantum mechanical symmetrization postulates do not pertain to\emph{particles}, as we know them from classical physics, but rather to indicesthat have a merely formal significance. This conclusion raises the question ofwhether the discussions about the status of identical quantum particles havenot been misguided from the very start.

How Classical Particles Emerge From the Quantum World