One of the achievements of the intuitionists was to remind us that moral judgements are distinctive or sui generis. Just as not all values are moral values, so not all judgements are moral judgements. But, more than this, moral judgements such as ‘That is wrong’ do not work in exactly the same way as, for example, aesthetic judgements (‘That is beautiful’), commands (‘Go away’), judgements of taste (‘I adore your hat’), or, of course, assertions of empirical fact (‘That car was going at 75 m.p.h.’). Philosophers of the twentieth century made a particular contribution to our understanding of the nature of moral discourse – how moral utterances function or work – which tells us something about the nature of moral judgements.