Gilbert Harman

According to moral relativism, there is not a single true morality. There are a variety of possible moralities or moral frames of reference, and whether something is morally right or wrong, good or bad, just or unjust, etc. is a relative matter—relative to one or another morality or moral frame of reference. Something can be morally right relative to one moral frame of reference and morally wrong relative to another. It is useful to compare moral relativism to other relativisms. One possible comparison is with motion relativism. There is no such thing as absolute motion or absolute rest. Whether something is moving or at rest is relative to a spatio-temporal frame of reference. Something may be at rest in one frame of reference and moving in another. There is no such thing as absolute motion and absolute rest, but we can make do with relative motion and rest. Similarly, moral relativism is the view that, although there is no such thing as absolute right and wrong, we can make do with relative right and wrong

In (Harman 2007) I argued “that a purely objective account of conscious experience cannot always by itself give an understanding of what it is like to have that experience.” Following Nagel (1974), I suggested that such a gap “has no obvious metaphysical implications. It [merely] reflects the distinction between two kinds of understanding,” objective and subjective, where subjective understanding or “Das Verstehen” (Dilthey 1883/1989) of another creature’s experience involves knowing what it is like to have that experience—knowing what sort of experience of one’s own would correspond to the other creature’s experience.

A proper understanding of intentionality is crucial to the study of a number of topics in cognitive science, including perception, imagery, and consciousness. The term itself, intentionality, can be misleading, in suggesting intentional action, doing something intentionally, with a certain aim or purpose. In cognitive science, the term is used in a different, more technical sense. Intentionality involves reference or aboutness or some similar relation to something having what the scholastics of the Middle Ages called intentional inexistence.

Gauthier's title is potentially misleading. The phrase “morals by agreement” suggests a social contract theory of morality according to which basic moral principles arise out of an actual or hypothetical agreement. John Rawls defends a hypothetical agreement version, arguing that the basic principles of justice are those that would be agreed to in an initial position of fair equality. I myself defend an actual agreement version, arguing that the moral principles that apply to a person derive from implicit conventions the person has accepted in dealing with other people. Gauthier's view is different from either of these sorts of contract theory. Instead, he holds that certain basic principles of impartiality are prior to actual agreements

I begin by summarizing the first two chapters of (Harman 1986). The first chapter stresses the importance of not confusing inference with implication and of not confusing reasoning with the sort of argument studied in deductive logic. Inference and reasoning are psychological events or processes that can be done more or less well. The sort of implication and argument studied in deductive logic have to do with relations among propositions and with structures of propositions distinguished into premises, intermediate steps, and conclusion. Deductive logic is not a particular psychological subject and is not a particularly normative subject, although one might attempt to develop a logic of belief or a deontic logic, for example.