At one time, many philosophers held that faultless "laws of thought" were somehow inherent, a priori, in the very nature of mind. This belief was twice shaken in the past century; first when Russell and his successors showed how the logic men employ can be defective, and later when Freud and Piaget started to reveal the tortuous ways in which our minds actually develop. After Russell observed that the seemingly frivolous "Who shaves the Barber, who shaves everyone who does not shave himself?" was a truly serious obstacle to formalizing common sense logic, he and others tried to develop new formalisms that voided such problems -- by preventing the fatal self-references. But the proposed substitutes were much too complicated to serve for everyday use.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "At one time, many philosophers held that faultless "laws of thought" were somehow inherent, a priori, in the very nature of mind. This belief was twice shaken in the past century; first when Russell and his successors showed how the logic men employ can be defective, and later when Freud and Piaget started to reveal the tortuous ways in which our minds actually develop. After Russell observed that the seemingly frivolous "Who shaves the Barber, who shaves everyone who does not shave himself?" was a truly serious obstacle to formalizing common sense logic, he and others tried to develop new formalisms that voided such problems -- by preventing the fatal self-references. But the proposed substitutes were much too complicated to serve for everyday use." in the context of "Marvin Minsky, "Jokes and their Relation to the Cognitive Unconscious" (1980)" to mean that wisdom is timeless.