In this form of contractualism, judgements about right and wrong, unlike empirical judgements, are not theoretical claims about the nature of the spatiotemporal world but rather practical claims about what we have reason to do. Further, they are a particularly important class of practical claims in that the judgement that an action is wrong is taken to provide reasons to not do that action which are most often considered to be decisive against competing reasons. Following this point, Scanlon takes questions about the reason-giving force of moral judgements to be prior to questions about the subject matter of the morality of right and wrong. More explicitly, he thinks that if we provide an account of the extraordinary reason-giving force of moral judgements then this account could largely form the basis for a characterisation of the subject matter of what we owe to each other.