I am sitting with a philosopher in the garden; he says again and again 'I know that thatโs a tree', pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: 'This fellow isnโt insane. We are only doing philosophy.
Ludwig WittgensteinIf you tried to doubt everything you would not get as far as doubting anything. The game of doubting itself presupposes certainty.
Ludwig WittgensteinWhat has history to do with me? Mine is the first and only world! I want to report how I find the world. What others have told me about the world is a very small and incidental part of my experience. I have to judge the world, to measure things.
Ludwig Wittgenstein