It was something of a dogma for much of the twentieth century that one cannot validly derive an ought from an is. More generally, it was held that non-normative propositions do not entail normative propositions. Call this thesis about the relation between the natural and the normative Natural-Normative Autonomy. The denial of Autonomy involves the entanglement of the natural with the normative. Naturalism entails entanglement—in fact it entails the most extreme form of entanglement—but entanglement does not entail naturalism. In a (...) ground-breaking paper “The autonomy of ethics” Arthur Prior constructed some intriguing counterexamples to Autonomy. While his counterexamples have convinced few, there is little agreement on what is wrong with them. I present a new analysis of Autonomy, one which is grounded in a general and independently plausible account of subject matters. While Prior’s arguments do establish shallow natural-normative entanglement, this is a consequence of simple logical relationships that hold between just about any two subject matters. It has nothing special to do with the logical structure of normativity or its relation to the natural. Prior’s arguments leave the fundamental idea behind natural-normative Autonomy intact. I offer a new argument for deep entanglement. I show that in any framework adequate for dealing with the natural and the normative spheres, a purely natural proposition entails a purely normative proposition, and vice-versa. But this is no threat to non-naturalist moral realism. In fact it helps ameliorate the excesses of an extreme non-naturalism, delivering a more palatable and plausible position. (shrink)

Abstract Suppose one is persuaded of the merits of noncognitivism in ethics but not those of expressivism: in such a case, a form of moral fictionalism, combining a descriptivist account of moral sentences with a noncognitivist account of the attitudes involved in their acceptance or rejection, might seem an attractive alternative. This paper argues against the use of moral fictionalism as a strategy for defending noncognitivism in ethics. It argues, first, that the view is implausible as it stands and, second, (...) that it does not enjoy the benefits over standard?expressivist?noncognitivism both that it claims to enjoy and that make up the principal rationale for the view. The paper then turns to the grounds for noncognitivism itself before showing how far the criticisms developed extend to alternative forms of moral fictionalism and developing independent objections to each. (shrink)