Is the existence of God a question of fact? To the majority of theists, both now and in the past, I think it has seemed clear that, if the phrase ‘God exists’ is to be meaningful, then it is a fact, either that God exists or that he does not. This assertion may even seem trivially true; and yet it has evidently been denied, in recent years, by many theologians. The reasons for such a denial are, in part, to be found in the general reaction against metaphysical philosophy, which was characteristic of the early years of this century, and which is, in Britain, epitomised by A. J. Ayer's stipulation that no proposition can be factually significant unless it is verifiable; unless, in principle at least, some series of observations could conceivably show it to be true. By restricting ‘observation’ to the senses of the physical body, and by emphasising the fact that God, as transcendent by definition, was not a possible object of the senses, some philosophically sensitive theologians were startled into denying that ‘God’ was, even in principle, verifiable; and consequently into denying that propositions purporting to assert his existence were factual.