Does rationality require us to take the means to our ends? Intuitively, it seems clear that it does. And yet it has proven difficult to explain why this should be so: after all, if one is pursuing an end that one has decisive reason not to pursue, the balance of reasons will presumably speak against one's taking the means necessary to bring that end about. In this paper I propose a novel account of the instrumental requirement which addresses this problem. (...) On the view I develop, the instrumental requirement is normative not because agents have reasons to comply with it, but because it is anormative standardintrinsic to intentional action—i.e., it is a standard that partly spells out what it is to exercise one's agency well. (shrink)

If a person's head moves, she may or may not have moved her head, and, if she did move it, she may have actively performed the movement of her head or merely, by doing something else, caused a passive movement. And, if she performed the movement, she might have done so intentionally or not. This short array of contrasts (and others like them) has motivated questions about the nature, variety, and identity of action. Beyond the matter of her moving, when (...) the person moves her head, she may be indicating agreement or shaking an insect off her ear. Should we think of the consequences, conventional or causal, of physical behavior as constituents of an action distinct from but ‘generated by’ the movement? Or should we think that there is a single action describable in a host of ways? Also, actions, in even the most minimal sense, seem to be essentially ‘active’. But, how can we explain what this property amounts to and defend our wavering intuitions about which events fall in the category of the ‘active’ and which do not? (shrink)

If you are more likely to continue a course of action in virtue of having previously invested in that course of action, then you tend to honor sunk costs. It is widely thought both that (i) individuals often do give some weight to sunk costs in their decision-making and that (ii) it is irrational for them to do so. In this paper I attempt to cast doubt on the conventional wisdom about sunk costs, understood as the conjunction of these two (...) claims. (shrink)

Recently, much attention has been paid to ‘rational requirements’ and, especially, to what I call ‘rational requirements of formal coherence as such’. These requirements are satisfied just when our attitudes are formally coherent: for example, when our beliefs do not contradict each other. Nevertheless, these requirements are puzzling. In particular, it is unclear why we should satisfy them. In light of this, I explore the conjecture that there are no requirements of formal coherence. I do so by trying to construct (...) a theory of error for the idea that there are such requirements. (shrink)

Pure time preference is a preference for something to come at one point in time rather than another merely because of when it occurs in time. In opposition to Sidgwick, Ramsey, Rawls, and Parfit we argue that it is not always irrational to be guided by pure time preferences. We argue that even if the mere difference of location in time is not a rational ground for a preference, time may nevertheless be a normatively neutral ground for a preference, and (...) this makes it plausible to claim that the preference is rationally permitted. (shrink)

Johansson and Rosenqvist reject our argument for the rational permissibility of pure time preferences (PTP). Johansson and Rosenqvist's main objection is that where two options, X and Y, have equal intrinsic value, there will be a reason to be indifferent between X and Y, and therefore a reason to not hold a PTP for X or Y. In this reply, we argue that if two options have equal intrinsic value, it does not follow that you have a reason to be (...) indifferent. Rather, the two equally large intrinsic values cancel each other out, like two equal weights on kitchen scales. (shrink)

According to current orthodoxy in the philosophy of action, intentional actions consist in intrinsically mindless bodily movements that stand in causal relations to appropriate mental states. This paper challenges this approach to intentional action, by arguing that there are not enough appropriate mental states around to ‘animate’ all of the bodily movements we intuitively count as intentional actions. In the alternative picture I suggest, the bodily movements that constitute our intentional actions are themselves to be thought of as cognitive events, (...) embodying our grasp of ways of acting. (shrink)

While logical theories of information attitudes, such as knowledge, certainty and belief, have flourished in the past two decades, formalization of other facets of rational behavior have lagged behind significantly. One intriguing line of research concerns the concept of intention. I will discuss one approach to tackling the notion within a logical framework, based on a database perspective.