I have heard it said by people who fancy themselves physicists that Pauli exclusion is the explanation for why there cannot be two objects in the same place at the same time. This is claimed in criticism of my discussion of the latter principle in my book Basic Structures of Reality. It is completely wrong and totally misunderstands the principle in question. That principle has to do with questions of individuation and metaphysical necessity not the laws of physics (see David Wiggins’ classic discussion in “On Being in the Same Place at the Same Time” in Philosophical Review 1968). Pauli exclusion has to do with quantum states not quantum particulars, and anyway does not apply to many particles (only to fermions). Those who essay this criticism are clearly ignorant of the metaphysical issues at stake.