“If a dog jumps in your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.” Alfred North WhiteheadFebruary 15, 1861, Ramsgate, Kent, England – December 30, 1947, Cambridge, Massachusetts, U.S.) was an English mathematician who became a philosopher. He wrote on algebra, logic, foundations of mathematics, philosophy of science, physics, metaphysics, and education. He coauthored the epochal Principia Mathematica with Bertrand Russell.
