“One anecdote should be recorded. I asked Wittgenstein whether, when he wrote the Tractatus, he had ever decided upon anything as an example of a 'simple object'. His reply was that at that time his thought had been that he was a logician; and that it was not his business, as a logician, to try to decide whether this thing or that was a simple thing or a complex thing, that being a purely empirical matter! It was clear that he regarded his former opinion as absurd.”