By 1799 the number of Martha Washington's dower slaves had grown to 153; George Washington owned 124 people, and at least a dozen Washington-owned slaves intermarried.
Hund's rule of maximum multiplicity is a rule based on observation of atomic spectra, which is used to predict the ground state of an atom or molecule with one or more open electronic shells.
What is the 'Peter Principle'. The Peter Principle is an observation that the tendency in most organizational hierarchies, such as that of a corporation, is for every employee to rise in the hierarchy through promotion until they reach the levels of their respective incompetence.