 Expressivists have not always been clear about exactly the range of target mental states expressible in this way, but it seems plausible that at least in principle some true (or apt) self-ascriptions could arise in this manner, with no intervening introspective self-detection. The question would then be whether this is how we generally arrive at true self-ascriptions, for some particular class of mental states, or whether some more archetypically introspective process is also available. (For a more detailed treatment of expressivism, consult the section about the expressivist model of self-knowledge in the entry  self-knowledge.)