On Certainty

On Certainty

By Ludwig Wittgenstein

Harper Perennial, Paperback, 9780061316869, 192pp.

Publication Date: September 1972


Written over the last 18 months of his life and inspired by his interest in G. E. Moore's defense of common sense, this much discussed volume collects Wittgenstein's reflections on knowledge and certainty, on what it is to know a proposition for sure.

About the Author
Ludwig Wittgenstein (1889-1951) was arguably the most influential philosopher of the twentieth century. He was born in Vienna, but studied and practiced philosophy in Great Britain. He was a professor of philosophy at the University of Cambridge from 1939 until 1947. He worked in and transformed the fields of logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language.