Many Muslims take the position that religious doubts constitute a serious problem for anyone who regards himself or herself as a Muslim, arguing that such a predicament may even result in apostasy. According to this position, the main problem with a Muslim who harbours religious doubts, a ‘Sceptical Muslim’, is that he or she is culpable for failing to respond appropriately to epistemic certainty about fundamental Islamic doctrine, primarily the existence of God and the Prophethood of Muhammad. I shall argue that, contrary to what many Muslims have asserted, the position of the ‘Sceptical Muslim’ is a viable one in an Islamic context.