 In recent years, there has been a proliferation of different formulations of relativism (for discussion of some of these, see Fricker 2013, Krausz 2011 and López de Sa 2011). It is important to note several distinctions that may be made in formulating different metaethical relativist positions. First, a distinction is sometimes drawn between content relativism, the view that sentences may have different contents (meanings) in different frameworks, and truth relativism, the view that sentences have the same content in different frameworks, but their truth-value may vary across these frameworks (for a discussion of this distinction in terms of moral relativism, see Prinz 2007: 180–3). In the discussions that follow, truth relativism is ordinarily assumed. Second, it is sometimes said that the truth or justification of moral judgments may be relative to an individual person as well as a group of persons. In this article, the latter will be assumed, as in the definition of MMR, unless otherwise noted. Third, that to which truth or justification is relative may be the persons making the moral judgments or the persons about whom the judgments are made. These are sometimes called appraiser and agent relativism respectively. Appraiser relativism suggests that we do or should make moral judgments on the basis of our own standards, while agent relativism implies that the relevant standards are those of the persons we are judging (of course, in some cases these may coincide). Appraiser relativism is the more common position, and it will usually be assumed in the discussion that follows. Finally, MMR may be offered as the best explanation of what people already believe, or it may be put forward as a position people ought to accept regardless of what they now believe. There will be occasion to discuss both claims below, though the latter is probably the more common one.