This volume is a collation of original contributions from the key actors of a new trend in the contemporary theory of knowledge and belief, that we call “dynamic epistemology”. It brings the works of these researchers under a single umbrella by highlighting the coherence of their current themes, and by establishing connections between topics that, up until now, have been investigated independently. It also illustrates how the new analytical toolbox unveils questions about the theory of knowledge, belief, preference, action, and (...) rationality, in a number of central axes in dynamic epistemology: temporal, social, probabilistic and even deontic dynamics. (shrink)

Coordination games show that all individuals can do what is right according to act‐consequentialism, even if they do not bring about the best outcome as a group. This creates two problems for act‐consequentialism. First, it cannot accommodate the intuition that there is some moral failure in these cases. Second, its formulation as a criterion of rightness conflicts with the underlying act‐consequentialist concern that the best outcome is brought about. The collectivist view solves these problems by holding that any group of (...) two or more individual agents, and only individual agents, is a collective agent who itself can act rightly or wrongly. When such a collective agent does what is wrong, there is a moral failure. When all collective agents do what is right, the best outcome is brought about. In this paper, I defend the collectivist view against the No Act Objection, according to which the doings of many so called disunified collectives are not acts. (shrink)

There is a theory that one ought morally to do the best one can, when ‘best’ is suitably interpreted. There are also some examples in which, although every agent involved does the best she can, the group composed of them does not. Some philosophers think that these examples show the theory to be wrong. In particular, they think that such examples motivate a view which incorporates a requirement of cooperativeness in a particular way, though they disagree as to the exact (...) nature of this requirement. This paper will argue both that such views are problematic and that the examples do not motivate departure from the original theory. (shrink)

There is a theory that one ought morally to do the best one can, when 'best' is suitably interpreted. There are also some examples in which, although every agent involved does the best she can, the group composed of them does not. Some philosophers think that these examples show the theory to be wrong. In particular, they think that such examples motivate a view which incorporates a requirement of cooperativeness in a particular way, though they disagree as to the exact (...) nature of this requirement. This paper will argue both that such views are problematic and that the examples do not motivate departure from the original theory. (shrink)

This paper works within a particular framework for reasoning about actions—sometimes known as the framework of “stit semantics”—originally due to Belnap and Perloff, based ultimately on the theory of indeterminism set out in Prior’s indeterministic tense logic, and developed in full detail by Belnap, Perloff, and Xu [3]. The issues I want to consider arise when certain normative, or decision theoretic, notions are introduced into this framework: here I will focus on the notion of a right action, and so on (...) the formulation of act utilitarianism within this indeterministic setting. The problem is simply that there are two different, and conflicting, ways of defining this notion, both well-motivated, and both carrying intuitive weight. (shrink)