 The metaethical position usually concerns the truth or justification of moral judgments, and it has been given somewhat different definitions. Metaethical relativists generally suppose that many fundamental moral disagreements cannot be rationally resolved, and on this basis they argue that moral judgments lack the moral authority or normative force that moral objectivists usually contend these judgments may have. Hence, metaethical relativism is in part a negative thesis that challenges the claims of moral objectivists. However, it often involves a positive thesis as well, namely that moral judgments nonetheless have moral authority or normative force, not absolutely or universally (as objectivists contend), but relative to some group of persons such as a society or culture. This point is typically made with respect to truth or justification (or both), and the following definition will be a useful reference point: