For 10 points, what principle, which states that no two fermions can share all four quantum numbers, forces electrons in the same subshell to have different spin?
The EPR paradox requires that either this principle or locality must be broken. One of the consequences of this principle is the existence of the Tolman-Oppenheimer-Volkoff limit of neutron stars, because it provides for the degeneracy pressure that supports them. Although (*) bosons do not obey it, this law applies for all particles governed by Fermi-Dirac statistics. For 10 points, what principle, which states that no two fermions can share all four quantum numbers, forces electrons in the same subshell to have different spin?
The EPR paradox requires that either this principle or locality must be broken.
{Pauli} Exclusion Principle