Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The term raised to the negative twelfth power in the Lennard-Jones potential accounts for this rule. White dwarfs exhibit electron degeneracy pressure, a factor limiting how much they can compress based on this rule. In general, this rule applies to half-spin particles called fermions meaning two particles can occupy the same region if and only if they have opposing spins. For 10 points, name this rule of quantum mechanics typically stated as no two electrons can have the same four quantum numbers.
Science