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.

Harper, 1972.
ISBN: 9780061316869.
Edited by G.E.M. Anscombe and G.H. von Wright.
Translated by Denis Paul and G.E.M. Anscombe.
Later printing.
Softcover. Near fine.