 The needed apprehension of God would need to be self-evident. For suppose my apprehension is grounded in a demonstration. In that case, it’s possible to think of the conclusion of that demonstration without also thinking of the premises; and on such occasions, my confidence in the demonstration is vulnerable to an indirect doubt. Thus, the needed apprehension of God is a self-evident, clear and distinct conception that renders – as literally unthinkable – the very sceptical scenarios that underwrite indirect doubt.