ABSTRACT
The possibility of there being no necessity in the universe, let alone in our thinking, is such a disturbing thought that it led Albert Einstein to declare, in a letter to a friend in 1924, that if it were the case that the motion of an electron when exposed to a ray was not, of necessity, one path or another, he would rather be a cobbler or work in a gambling casino than be a physicist. As it turned out, he labored as a physicist for the remainder of his career to uncover an inconsistency in quantum mechanics that would guarantee an inherent necessity in the universe.
