  A complication is that the justification of moral claims in Rawls proceeds also by arguing that rational persons in a hypothetical “original position” of freedom and equality would be rational to choose certain principles of social justice. Though in this appeal to rational choice Rawls is explicitly engaged in a social contract theory of justice and thus a particular type of normative theory, the implications are more general. The larger suggestion is that moral truth is based significantly on which moral norms can be rationally chosen by members of a given society as norms under which they would be prepared to live. (Compare the accounts of moral truth in Brandt 1979, Copp 1995, and Braybrooke 2001, none of which defend social contract theory, but all of which base moral truth on rational choice. Gauthier 1986 appeals to rational choice to determine which moral norms are justified but without supposing that moral judgments have truth value.)