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.

This essay examines the manner in which Hume challenges the cognitivist and realist intuitions informing our ordinary experience of value by identifying values with mind-dependent feelings and by separating facts from values. However, through a process of interpretive rehearsal of Hume’s arguments in the first two parts of the paper we find that they come under increasing internal strain, which points, contrary to his initial argument about the irreducibly phenomenal aspects of value experience, to the motivational role of reason and (...) to the identification of values, not with mind-dependent feelings, but with dispositional properties of objects. The third and final part of the paper will offer a systematic reconstruction of his arguments with a view to suggesting one possible – descriptivist – alternative to Hume’s initial challenges, which can serve to satisfy the emerging cognitivist and realist needs of his arguments. (shrink)

In this paper I consider Hume's position on the analogy between moral qualities and secondary qualities. Although some have suggested that Hume's use of the analogy is important to his moral philosophy, others have disputed its significance to Hume. My position in this paper is that Hume believes there are indeed similarities between moral and secondary qualities that illuminate the nature of virtue. This paper is divided into two parts. In the first, I consider Hume's point(s) in raising the analogy (...) by arguing for four similarities between moral qualities and secondary qualities that he likely had in mind; and in the second, I respond to various objections alleging that Hume did not, and indeed, could not, rely on the analogy in any substantial way. (shrink)

Is Hume a naturalist? Does he regard all or nearly all beliefs and actions as rationally unjustified? In order to settle these questions, it is necessary to examine their key terms and to understand the character-especially the normative character-of Hume's philosophical project. This paper argues that Hume is a naturalist-and, in particular, both a moral and an epistemic naturalist-in quite robust ways; and that Hume can properly regard many actions and beliefs as "rationally justified" in several different senses of that (...) term. (shrink)