 Second (and much more influentially) some non-cognitivists about ethical thought and talk deny that our ethical claims express beliefs about the ethical nature of the world, suggesting instead that they express desire-like mental states. Such a view may make ontological supervenience claims about ethics appear misleading at best. More interesting is the question of what non-cognitivists can say about the sort of ascriptive supervenience thesis discussed in   Section 1.4: