This collection of previously unpublished essays addresses a number of issues arising out of philosophical controversies over the possibility of genuine moral dilemmas. Issues addressed include the form of a moral dilemma; the paradoxes a moral dilemma is said to entail; the question of whether a moral dilemma must exhibit inconsistency; the role of intractable circumstances in occasioning moral dilemmas; and the plausibility of supposing that there might be rational ways of addressing moral dilemmas in practice. The contributors, writing from (...) a number of widely differing points of view, include Simon Blackburn, Ruth Barcan Marcus, Alan Donagan, Terrance McConnell, Walter Sinnott-Armstrong, Mary Mothersill, Norman Dahl, David Brink, Peter Railton, Thomas E. Hill, Jr., Christopher Gowans, and H.E. Mason. (shrink)

Diachronic identity is understood as an identity holding between something existing at one time and something existing at another time. On the stage view, however, ordinary objects are instantaneous stages that do not exist at other times so diachronic identity is, at best, problematic. On account proposed here a name does not, as Sider and others suggest, denote a stage concurrent with its utterance. Rather, at any time, t, a name of an ordinary object designates a stage-at-t as its primary (...) referent and refers indeterminately over it and all and only those stages counterpart-related to it—its reference class at t. At any time, t, a at t1 is the same object as b at t2 iff for every stage x counterpart-related to a’s stage-at t and every stage y counterpart-related to b’s stage-at-t, x=y. Diachronic identity statements, therefore, assert strict identities—between concurrent stages. Ordinarily names select the same reference classes at every time so, in ordinary cases, identity statements are not ‘occasional’. In fission cases names select different reference classes at different times. Where a becomes b and c, at any pre-fission time ‘a’, ‘b’, and ‘c’ have same the primary referent and so select the same reference class—therefore, before fission b is the same object as c. At any post-fission time ‘b’ and ‘c’ select different reference classes—so after fission b is not the same object as c. Identity is not occasional but, in extraordinary cases, identity statements are—because reference is. (shrink)

Biological research on aggression is increasingly consulted for possible answers to the social problems of crime and violence. This paper reviews some contrasting approaches to the biological understanding of behavior-behavioral genetic, social-environmental, physiological, developmental-as a prelude to arguing that approaches to aggression are beset by vagueness and imprecision in their definitions and disunity in their measurement strategies. This vagueness and disunity undermines attempts to compare and evaluate the different approaches empirically. Nevertheless, the definitions reveal commitments to particular metaphysical views concerning (...) behavior. Alternative understandings of aggression suggest even different research approaches than those most commonly found in the literature. (shrink)