In a 1948 BBC broadcast, Frederick Copleston and Bertrand Russell debated the existence of God. The first part of the debate centered around the analytic/synthetic distinction and positivism, and at one point, father Copleston mentions:
We both know, at any rate, one very eminent modern thinker whose knowledge of modern logic was profound, but who certainly did not think that metaphysics are meaningless or, in particular, that the problem of God is meaningless.
Who was Copleston talking about? Wittgenstein? Gödel? Somebody else?