Andrew Reisner

This paper looks at the question of what form the requirements of practical rationality take. One common view is that the requirements of rationality are wide-scope, and another is that they are narrow-scope. I argue that the resolution to the question of wide-scope versus narrow-scope depends to a significant degree on what one expects a theory of rationality to do. In examining these expectations, I consider whether there might be a way to unify requirements of both forms into a single theory of rationality, and what the difficulties involved in doing so can teach us about the foundations of practical rationality

One way to approach the question of whether there are non-derivative partial reasons of any kind is to give an account of what partial reasons are, and then to consider whether there are such reasons. If there are, then it is at least possible that there are partial reasons of friendship. It is this approach that will be taken here, and it produces several interesting results. The first is a point about the structure of partial reasons. It is at least a necessary condition of a reason’s being partial that it has an explicit relational component. This component, technically, is a rela- tum in the reason relation that itself is a relation between the person to whom the reason applies and the person whom the action for which there is a reason concerns. The second conclusion of the paper is that this relational component is also required for a number of types of putatively impartial reasons. In order to avoid trivialising the distinction between partial and impartial rea- sons, some further sufficient condition must be applied. Finally, there is some prospect for a way of distinguishing between impartial reasons that contain a relational component and partial rea- sons, but that this approach suggests that the question of whether ethics is partial or impartial will be settled at the level of normative ethical discourse, or at least not at the level of discourse about the nature of reasons for action.

This chapter addresses an ambiguity in some of the literature on rational peer disagreement about the use of the term 'rational'. In the literature 'rational' is used to describe a variety of normative statuses related to reasons, justification, and reasoning. This chapter focuses most closely on the upshot of peer disagreement for what is rationally required of parties to a peer disagreement. This follows recent work in theoretical reason which treats rationality as a system of requirements among an agent's mental states. It is argued that peer disagreement has either no, or a very limited, affect on what rationality requires of an agent in a given circumstance. This is in part because of difficulties generated by a novel example of evidence of evidence of p being evidence against p. This example calls into question the mechanisms whereby peer disagreement might affect what is rationally required of an agent. The chapter also reevaluates the importance of actual peer disagreement against the backdrop of prior expectations about whether disagreement is believed to be likely, arguing that peer disagreement is most likely to change what is rationally required of an agent when it is believed to be unlikely.

As Dworkin puts it: moral scepticism is a moral view. This is in contrast to the more popular idea that the real challenge for moral realism is external scepticism, scepticism which arises because of non-moral considerations about the metaphysics of morality. I, too, do not concur with Dworkin’s strongest conclusions about the viability of external scepticism. But, I think his criticism of error scepticism offers a much needed corrective to more traditional metaethical projects. My aim in this paper is to split the difference between Dworkin’s view and more traditional views, concluding that Dworkin’s work in Justice for Hedgehogs contributes to metaethics for everyone.

John Broome has made major contributions to, and radical innovations in, contemporary moral philosophy. His research combines the formal method of economics with the philosophical analysis. Broome's works stretch over formal axiology, decision theory, philosophy of economics, population axiology, the value of life, the ethics of climate change, the nature of rationality, and practical and theoretical reasoning. Weighing and Reasoning brings together fifteen original essays from leading philosophers who have been influenced by the work and thought of John Broome.They explore Broome's works on the theory of value, and his works on practical and theoretical reasoning. This volume also includes Broome's note on his intellectual history to date.