Jonas Olson presents a critical survey of moral error theory, the view that there are no moral facts and so all moral claims are false. Part I explores the historical context of the debate; Part II assesses J. L. Mackie's famous arguments; Part III defends error theory against challenges and considers its implications for our moral thinking.

Game theory is the systematic study of interdependent rational choice. It should be distinguished from decision theory, the systematic study of individual (practical and epistemic) choice in parametric contexts (i.e., where the agent is choosing or deliberating independently of other agents). Decision theory has several applications to ethics (see Dreier 2004; Mele and Rawlings 2004). Game theory may be used to explain, to predict, and to evaluate human behavior in contexts where the outcome of action depends on what several agents (...) choose to do and where their choices depend on what others choose to do. (See the entry on game theory) Game theory consequently is relevant to ethics, and it is used in moral and political philosophy in a variety of ways. We shall concentrate on the influence and use of game theory in ethics and those parts of political theory involving norms or principles of justice, ignoring questions about political and legal institutions on the one hand and questions about issues dealing with moral virtues on the other. (shrink)

This paper considers and argues against old and recent readings of Hume according to which his account of moral judgement is non-cognitivist. In previous discussions of this topic, crucial metaethical distinctions-between sentimentalism and non-cognitivism and between psychological and semantic non-cognitivism-are often blurred. The paper aims to remedy this and argues that making the appropriate metaethical distinctions undermines alleged support for non-cognitivist interpretations of Hume. The paper focuses in particular on Hume's so-called 'motivation argument' and argues that it is a poor (...) basis for non-cognitivist interpretations. While there is textual support for attributing to Hume what may be called 'modally weak' motivational internalism, there is no solid textual support for attributing to him either psychological or semantic non-cognitivism. The paper also challenges briefly some further alleged support for non-cognitivist interpretations. It concludes by offering some positive evidence against such interpretations, namely that Hume appears to hold that there are moral beliefs and moral knowledge. (shrink)