Michael Smith

Some contemporary theories treat phenomena like weakness of will, compulsion and wantonness as practical failures but not as failures of rationality: say, as failures of autonomy or whatever. Other current theories-the majority see the phenomena as failures of rationality but not as distinctively practical failures. They depict them as always involving a theoretical deficiency: a sort of ignorance, error, inattention or illogic. They represent them as failures which are on a par with breakdowns of theoretical reason; the failures may not have exact theoretical analogues, exact analogues in the breakdown of belief, but they are of essentially the same, cognitive kind. Our approach gives us quite a different view of things. The pathologies which we identify in our taxonomy are distinctively rational failures and distinctively practical failures; they are failures of pure practical reason.

It seems to be a truism that whenever we do something - and so, given the omnipresence of trying (Hornsby 1980), whenever we try to do something - we want to do that thing more than we want to do anything else we can do (Davidson 1970). However, according to Frog, when we have will power we are able to try not to do something that we ‘really want to do’. In context the idea is clearly meant to be that what we really want to do and what we most want to do are one and the same. But how is this meant to be so much as possible? It seems to require that our desire not to do what we most want to do is both our strongest desire and not our strongest desire. And that is a blatant contradiction. This is the so-called ‘paradox of self-control’ (Mele 1987). The aim of our paper is to explain how to make sense of the story of Frog and Toad.

The Sources of Normativity is an ambitious and demanding book. It is impossible to do full justice to The Sources of Normativity in a review essay such as this. I shall therefore concentrate on Korsgaard’s partisan goal: her defence of a Kantian view about the sources of normativity. It was evidently this part that most excited the commentators when they first heard Korsgaard deliver her Tanner Lectures. I suspect it is the part of the book that will most excite the general reader as well. Certainly it was the part that most intrigued me.