Controversial philosopher who built breakthroughs in the philosophy of language, mind, metaphysics, and logic. He gained his Ph.D. from Harvard in 1967, where he was trained by W.V.O. Quine and got a workshop with J.J.C. Wise. He trained briefly at UCLA and frequently at Princeton. He received a kidney transplant from his wife after experiencing diabetes for a long period of time and finally died from the condition. He was inspired by Henry David Thoreau.