 A familiar account of our knowledge of others takes the form of an argument from analogy (Slote 1970: ch. 4; Avramides 2001: part I). The argument from analogy presents an account of our justification for moving from judgements about others’ observable behaviour to judgements about their unobservable mental states. I am aware from my own case that, say, wincing is the result of pain so, on seeing another’s wincing, I am justified in judging them to be in pain. On this picture, self-awareness, as manifest in the judgement about my own case, is a necessary condition of knowledge of other minds. In this respect the view is related to contemporary simulation theory, standard versions of which see our capacity to attribute mental states to others as dependent on our capacity to attribute them to ourselves (Heal 1986; Goldman 2006: ch. 9; for a simulationist theory that differs in this respect, see Gordon 1996). Associated with the argument from analogy is a view according to which our grasp of mental state concepts is an essentially first-personal affair. That is, we understand what, for example, pain is first from our own case (Nagel 1986: §2.3; Peacocke 2008: ch. 5–6; it has sometimes been claimed that this view gives rise to the conceptual problem of other minds, see Wittgenstein 1958: §302; McGinn 1984; Avramides 2001: part II).