I have maintained that some but not all prisoners' dilemmas are side-by-side Necomb problems. The present paper argues that, similarly, some but not all versions of Newcomb's Problem are prisoners' dilemmas in which Taking Two and Predicting Two make an equilibrium that is dispreferred by both the box-chooser and predictor to the outcome in which only one box is taken and this is predicted. I comment on what kinds of prisoner's dilemmas Newcomb's Problem can be, and on opportunities that results (...) reached may open for kinds of cooperative reasoning in versions of Newcomb's Problem. (shrink)

Among various cases that equally admit of evidentialist reasoning, the supposedly evidentialist solution has varying degrees of intuitive attractiveness. I suggest that cooperative reasoning may account for the appeal of apparently evidentialist behavior in the cases in which it is intuitively attractive, while the inapplicability of cooperative reasoning may account for the unattractiveness of evidentialist behaviour in other cases. A collective causal power with respect to agreed outcomes, not evidentialist reasoning, makes cooperation attractive in the Prisoners' Dilemma. And a natural (...) though unwarranted assumption of such a power may account for the intuitive appeal of the one-box response in Newcomb's Problem. (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)

This paper is about David Gauthier’s concept of constrained maximization. Attending to his most detailed and careful account, I try to say how constrained maximization works, and how it might be changed to work better. In section I, that detailed account is quoted along with amplifying passages. Difficulties of interpretation are explained in section II. An articulation, a spelling out, of Gauthier's account is offered in section III to deal with these difficulties. Next, in section IV, constrained maximization thus articulated (...) is tested on several choice problems and shown to be seriously wanting. It appears that there are prisoners’ dilemmas in which constrained maximizers would not cooperate to mutual advantage, but would interact sub-optimally just as straight-maximizers would. ‘Coordination problems’ are described with which constrained maximizers might, especially if transparent to one another, not be able to cope–problems in which they might not be able to make up their minds to do anything at all. And I prove that there are prisoners’ dilemmas that, though possible for real agents and for straight maximizers, are not possible for constrained maximizers, so that agents’ internalising dispositions of constrained maximization could not be of help in connection with such possibly impending dilemmas. Taking constrained maximization as it stands, there are many problems for which it does not afford the ‘moral solutions’ with which Gauthier would have it replace Hobbesian political ones. After displaying these shortcomings of constrained maximization as presently designed, I sketch, in section V, possible revisions that would reduce them, stressing that these revisions would not be cost-free. Whether finishing the job of fixing up and making precise constrained maximization would be worth the considerable trouble it would involve lies beyond the issues taken up in this paper. So, of course, do substantive comparisons of constrained maximization, perfected and made precise, and straight maximization. (shrink)

Can I will that my maxim becomes a universal law? . . .It would be easy to show how common human reason, with this compass, knows well how to distinguish . . . what is consistent or inconsistent with duty. (Kant, Foundations, 403–4)How exactly is this compass to work? Cases bring out connected difficulties to do, (1), with whether ''social contexts'' are to be in or out of descriptions of actions maxims would have agents do – for example, ''disarming alone'' (...) and ''voting when enough others would even if one did not'', or ''disarming'' and ''voting'' simply; and, (2), with a seldom noticed ambiguity of ''everyone''s acting in accordance with a maxim'' and ''a maxim''s becoming universal law''. The paper argues dilemmatically for the inadequacy of Kant''s test for maxims consistent with duty whatever policy for social contexts and manner of maxims becoming universal laws it is said to invoke. (shrink)