 To this familiar kind of objection, there are two equally familiar responses. One is to concede the objection and maintain that MMR is true and justified in some metaethical frameworks, but not others: It is not an objective truth that any reasonable and well-informed person has reason to accept. This may seem to concede a great deal, but for someone who is a relativist through and through, or at least is a relativist about metaethical claims, this would be the only option. The other response is to contest the claim that there is parity of reasoning in the two cases. This would require showing that the dispute about the irresolvability of moral disagreements (a metaethical debate) can be rationally resolved in a way that fundamental moral disagreements (substantive normative debates) themselves cannot. For example, the metaethical debate might be rationally resolved in favor of the relativist, while the substantive normative debates cannot be resolved.