Wikipedia contributors. (2025, February 2). Killing of Brian Thompson. In Wikipedia, The Free Encyclopedia. Retrieved 01:26, February 3, 2025, from https://en.wikipedia.org/w/index.php?title=Killing_of_Brian_Thompson&oldid=1273511347
In quantum mechanics, the Pauli exclusion principle states that two or more identical particles with half-integer spins (i.e. fermions) cannot occupy the same quantum state within a quantum system simultaneously.