The special status of instrumental reasons

The rationality of means-end reasoning is the bedrock of the Humean account of practical reasons. But the normativity of such reasoning can not be taken for granted. I consider and reject the idea that the normativity of instrumental reasoning can be explained – either in terms of its being constitutive of the very notion of having an end, or solely in terms of instrumental considerations. I argue that the instrumental principle is itself a brute norm, and that this is consistent with a Humean account of practical reasons.