Gareth Evans famously observed that he can answer the question ‘Do you think there is going to be a third world war?’ by attending to ‘precisely the same outward phenomena as I would attend to if I were answering the question “Will there be a third world war?”’ (1982, p. 225). This paper suggests that this observation follows from two independently plausible theses: first, the thesis that, in rational agents, being in a state which is conscious, and believing that one is in that state, go together; second, a thesis about what it is for a mental state to be conscious. The paper contrasts this suggestion with others that have been made in the literature regarding the nature and significance of Evan’s observation.