Can quite different values be rationally weighed against one another? Can the value of one thing always be ranked as greater than, equal to, or less than the value of something else? If the answer to these questions is no, then in what areas do we find commensurability and comparability unavailable? And what are the implications for moral and legal decision making? This book struggles with these questions, and arrives at distinctly different answers.".

In this paper I investigate whether there are genuine and irreducible pressures of diachronic rationality grounded on the structure of the subject rather than on substantive considerations, such as pragmatic ones. I argue that structural pressures of diachronic rationality have a limited scope. The most important pressure only tells against arbitrary interference with the mechanisms for the retention of attitudes over time. I then argue that in the practical case, a substantial account in terms of the agent's temporal identity appears (...) more promising than a purely structural one, but in the end it still leaves many questions about diachronic practical rationality underdetermined. (shrink)

It is commonly recognized that not all actions are candidates for moral evaluation. For instance, morality is silent on the issue whether to tie one's right shoe before one's left shoe or the other way around. This shoe-tying action is not a candidate for moral appraisal. The matter is amoral, for neither alternative is morally required nor forbidden, and both are permissible. It is not commonly recognized that not all actions are candidates for prudential evaluation. I shall argue, however, that (...) there are cases of individual action over time, as well, that are aprudent in the sense that none of the alternatives under consideration are required or forbidden by prudence, but all of them are permissible. These are cases in which there is no fact of the matter as to what is the best choice for one. There are at least two such cases: first, cases in which the alternative courses of action open to one are incommensurable; and second, cases in which one's values are not yet determined and one is deciding what values to adopt, what sort of person to become, or what ideals to pursue. In these cases, prudence is silent on the question of what one ought to do. Indeed, I go on to argue prudence can even be silent on the question whether to act according to the values one currently holds or to pursue an entirely different course that will result in changes to one's values, which is the third case of aprudent choice. (shrink)

This paper offers an overview of the ways agents might extend over time and the characteristic structure of extended human agency. Agency can extend in two distinct but combinable modes: the ontological, which gives rise to simple continuous agents; and the conceptual, which gives rise to agents who conceive of and care about distal times, and have minimal planning abilities. Our extended form of agency combines both. But we are still limited by the temporal locality in the operation of our (...) psychological and executive powers. To account for this locality, I introduce the notion of 'temporal selves,' as the loci of immediacy in the agent's determination of their psychology, conduct, and practical standpoint. I argue that the passage of time generates, by itself, the threat of temporal alienation from distant temporal selves. A genuinely extended agency requires temporal identification: the sharing, by separate temporal selves, of a temporally extended and integrated practical standpoint. This temporal identification cannot be produced simply by temporal identity as continuity. What is required is temporal identity in the mode of unity and integration. This identity does not precede temporal identification but is co-constituted with it. I offer a preliminary account of the structure of the units of integration for agents who aspire to persist in the mode of unity and integration. I close with a cautionary note: the complex structure of integration, although familiar in everyday life, is often missed by standard philosophical accounts, which tend to focus on simple models of extended agency. (shrink)

In this article we discuss what we call the deliberative division of epistemic labor. We present evidence that the human tendency to engage in motivated reasoning in defense of our beliefs can facilitate the occurrence of divisions of epistemic labor in deliberations among people who disagree. We further present evidence that these divisions of epistemic labor tend to promote beliefs that are better supported by the evidence. We show that promotion of these epistemic benefits stands in tension with what extant (...) theories in epistemology take rationality to require in cases of disagreement. We argue that the epistemic benefits that result from the deliberative division of epistemic labor can provide epistemic reason to maintain confidence in cases of disagreement. We then show that the deliberative division of epistemic labor constitutes a distinct kind of epistemic dependence. (shrink)

Bartha and DesRoches (2021) and Steel and Bartha (2023) argue that we should understand the precautionary principle as the injunction to maximise lexical utilities. They show that the lexical utility model has important pragmatic advantages. Moreover, the model has the theoretical advantage of satisfying all axioms of expected utility theory except continuity. In this paper I raise a trilemma for any attempt at modelling the precautionary principle with lexical utilities: it permits choice cycles or leads to paralysis or implies that (...) the smallest value difference that is possible in a context has extreme axiological implications. (shrink)

– We offer a new motivation for imprecise probabilities. We argue that there are propositions to which precise probability cannot be assigned, but to which imprecise probability can be assigned. In such cases the alternative to imprecise probability is not precise probability, but no probability at all. And an imprecise probability is substantially better than no probability at all. Our argument is based on the mathematical phenomenon of non-measurable sets. Non-measurable propositions cannot receive precise probabilities, but there is a natural (...) way for them to receive imprecise probabilities. The mathematics of non-measurable sets is arcane, but its epistemological import is far-reaching; even apparently mundane propositions are liable to be affected by non-measurability. The phenomenon of non-measurability dramatically reshapes the dialectic between critics and proponents of imprecise credence. Non-measurability offers natural rejoinders to prominent critics of imprecise credence. Non-measurability even reverses some of the critics’ arguments—by the very lights that have been used to argue against imprecise credences, imprecise credences are better than precise credences. (shrink)

Ruth Chang and Joseph Raz have both drawn far-reaching consequences for agency from the phenomenon of incommensurability. After criticizing their arguments, I outline an alternative view: if incommensurability is vagueness, then there are no substantial implications for agency, except perhaps a limited form of naturalistic voluntarism if our reasons are provided by desires.

Many moral theories incorporate the idea that when an action is wrong, it is wrong because that there was something else that the agent could and should have done instead. Most notable among these are consequentialist theories. According to consequentialism an action A is wrong if and only if there was another action B that the agent could have performed such that, if the agent had performed B instead of A, the consequences would have been better. Relatively little attention has (...) been given to the question of how to understand the meaning of ‘could have’ in this specific context. However, without an answer to this question, consequentialist theories fail to yield determinate verdicts about the deontic status of actions in real scenarios. It is here argued that the following conditional analysis provides the required answer and gives us the most plausible version of consequentialism: the agent could have done B instead of A if and only if, there is a decision such that had the agent made this decision, then she would have done B, and not A. Such a conditional analysis has been universally rejected as an analysis of the general meaning of ‘could have’, but we show that in the specific context of specifying the meaning of ‘could have’ in a consequentialist criterion of right and wrong action, all the standard objections to it fail. (shrink)