Following the formulation of the Identity Theory by Place and Smart a few years ago, there was considerable discussion of subjective mental states and of the importance of first-person reports of mental events. One concern was that the logical status of first-person claims might commit us to belief in irreducible mental phenomena referred to by such propositions. If so the Identity Theory would be false. Kurt Baier went so far as to argue that the incorrigibility of propositions such as “I have a pain” demonstrates that Smart's identification of sensations with brain states and processes is untenable. While there is no point to reintroducing historical discussions it is worth remarking because a more general problem is reflected in this kind of debate. This is the problem of how we expect our ordinary intuitions and ways of talking about something to affect our theoretical view of it or vice versa. In this particular instance it manifests itself as the question of the extent to which a theory of persons is to be dictated to or decided by the common and generally accepted intuitions embedded in our psychological language.