To take an example, moral relativism, according to this approach, is the claim that the truth or justification of beliefs with moral content is relative to specific moral codes. So the sentence “It is wrong to sell people as slaves” is elliptical for “It is wrong to sell people as slaves relative to the moral code of …”. Or alternatively, as Kusch (2010) formulates the idea on behalf of the relativist: “It is wrong-relative-to-the-moral-code-of-…” to sell people as slaves. The resulting sentence(s) turns out to be true, according to the relativist, depending on how we fill in the “…”. So, “It is wrong to sell people as slaves” comes out true relative to the moral code of the United Nations Charter of Human Rights and false relative to the moral code of ancient Greece. The justifying thought is that judgments about the morality of slavery, or any other ethical issue, are based on differing conventions, and there is no universal or objective criterion for choosing among differing competing socio-historically constituted conventions. Moreover, as a corollary of this approach, there is no truth of the matter of whether it is wrong to sell people as slaves, independently of the specification of some standard. Thus on the hidden parameter account, a consequence is that the relevant claims will be true, if at all, only relative to some parameter.