Moore is taken to have followed Sidgwick in his arguments against naturalism and in his consequentialism. I argue that there are differences on both issues. Sidgwick's arguments against naturalism do not rely on a controversial view of analysis, and one of his arguments for consequentialism gives him greater resources against critics of consequentialism such as T. M. Scanlon.

Moore often is credited with implying the view that the meaning of evaluative or normative concepts is distinct from the criteria invoked to justify evaluative or normative judgments. A second view, to the effect that definitions cannot be evaluative or moral assertions, is attributed to him less frequently. In this paper, I shall argue that, while these views seem to be implied by much of what Moore says in Principia Ethica, Moore was not himself uniformly successful in observing their prohibitions. (...) In particular, I shall argue that his account of ‘Right’ in Principia involved the very confusions which he seems to imply others should avoid. Against this backdrop, however, his subsequent treatment of ‘right’ in his Ethics, as well as his retrospective remarks about the relationships between ‘good’ and ‘right’ in his “A Reply to My Critics”, can be interpreted as both predictable and necessary. If the argument developed in this paper is sound, the explanation of Moore's abandonment of his earlier account of ‘right’ is not, as he says, merely because that account is “paradoxical”, but lies, instead, in a latent inconsistency between his Principia account of this predicate and other principles implied in that work. (shrink)

In this article, it was first presented Moore’s paradox per se and after the author focused on the logical perspective — at first he analyzed these considerations in the field of so-called standard epistemic logic and after on the formal theory of belief change.

The phrase ‘autoepistemic logic’ was introduced in Moore [1985] to refer to a study inspired in large part by criticisms in Stalnaker [1980] of a particular nonmonotonic logic proposed by McDermott and Doyle.1 Very informative discussions for those who have not encountered this area are provided by Moore [1988] and the wide-ranging survey article Konolige [1994], and the scant remarks in the present introductory section do not pretend to serve in place of those treatments as summaries of the field. A (...) good deal of the material omitted here pertains to the specifically nonmonotonic nature of autoepistemic logic as standardly developed, but as we shall urge, there is from one point of view nothing distinctively nonmonotonic about the basic motivating ideas of the subject. (shrink)

This is a paper about the problem of realism in meta-ethics (and, I hope, also in other areas, but that hope is so far pretty speculative). But it is not about the problem of whether realism is true. It is about the problem of what realism is. More specifically, it is about the question of what divides meta-ethical realists from irrealists. I start with a potted history of the Good Old Days.

I believe that Moore's appeal to common sense has been misunder-stood both by his defenders and his critics. Besides the mistakes of the latter, there is one enormous howler which, in my opinion, the former have committed. This is to confuse or coalesce two quite distinct appeals which he made, namely the appeal to common sense and the appeal to ordinary language.