If you do know that here is one hand, we'll grant you all the rest.
Someone who, dreaming, says "I am dreaming," even if he speaks audibly in doing so, is no more right than if he said in his dream "it is raining," while it was in fact raining. Even if his dream were actually connected with the noise of the rain.
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.
(retrieved from Amazon Thu, 12 Mar 2015 18:08:07 -0400)