 Expressivist approaches differ as to the feature of avowals that they aim to explain. Finkelstein and Bar-On focus on the social-linguistic aspect of avowals, known as first-person authority: we ordinarily defer to others about their own mental states, so avowals are presumed to be true. Campbell focuses on the epistemic aspect of avowals, known as first-person privilege: our capacity to avow our mental states constitutes a privileged epistemic position vis-a-vis those states.