It's a result of half-integer spin particles having permutationally antisymmetric wavefunctions.  Quark colors were proposed to avoid its violation and it explains why cold electrons don't cascade into the atomic ground state.  For ten points, what r
It's a result of half-integer spin particles having permutationally antisymmetric wavefunctions.  Quark colors were proposed to avoid its violation and it explains why cold electrons don't cascade into the atomic ground state.  For ten points, what rule holds that no two fermions can simultaneously occupy the same quantum-mechanical state.
It's a result of half-integer spin particles having permutationally antisymmetric wavefunctions.  
Pauli exclusion principle