 Wright realises that the error-theorist is likely to have a story to tell about the point of moral discourse, about “some norm of appraisal besides truth, at which its statements can be seen as aimed, and which they can satisfy.” (1996: 2) And Mackie has such a story: the point of moral discourse is—to simplify—to secure the benefits of social co-operation (1973: chapter 5 passim; note that this is the analogue in Mackie’s theory of Field’s notion of the conservativeness of mathematical theories). Suppose we can extract from this story some subsidiary norm distinct from truth, which governs the practice of forming moral judgements. Then, for example, ‘Honesty is good’ and ‘Dishonesty is good’, although both false, will not be on a par in point of their contribution to the satisfaction of the subsidiary norm: if accepted widely enough, the former will presumably facilitate the satisfaction of the subsidiary norm, while the latter, if accepted widely enough, will frustrate it. Wright questions whether Mackie’s moral sceptic can plausibly combine such a story about the benefits of the practice of moral judgement with the central negative claim of the error-theory: