लुडविग विट्गेंश्टाइन

"Great philosophical biographies can be counted on one hand. Monk's life of Wittgenstein is such a one."—The Christian Science Monitor.

On Certainty is a philosophical book composed from the notes written by Ludwig Wittgenstein just prior to his death. Some of the notes were left at the home of G. E. M. Anscombe, who later compiled the notes into a book. The book's concerns are largely epistemological, its main theme being that there are some things …