 We must be careful, here, to distinguish the issue of whether principles commonly play an implicit or explicit role in moral reasoning, including well-conducted moral reasoning, from the issue of whether principles necessarily figure as part of the basis of moral truth. The latter issue is best understood as a metaphysical question about the nature and basis of moral facts. What is currently known as  moral particularism  is the view that there are no defensible moral principles and that moral reasons, or well-grounded moral facts, can exist independently of any basis in a general principle. A contrary view holds that moral reasons are necessarily general, whether because the sources of their justification are all general or because a moral claim is ill-formed if it contains particularities. But whether principles play a useful role in moral reasoning is certainly a different question from whether principles play a necessary role in accounting for the ultimate truth-conditions of moral statements. Moral particularism, as just defined, denies their latter role. Some moral particularists seem also to believe that moral particularism implies that moral principles cannot soundly play a useful role in reasoning. This claim is disputable, as it seems a contingent matter whether the relevant particular facts arrange themselves in ways susceptible to general summary and whether our cognitive apparatus can cope with them at all without employing general principles. Although the metaphysical controversy about moral particularism lies largely outside our topic, we will revisit it in  section 2.5,  in connection with the weighing of conflicting reasons. 