The epistemic relativist, as Paul Boghossian in developing his trenchant criticisms of relativism points out, is committed to a “doctrine of equal validity”, the view that “there are many radically different, incompatible, yet, ‘equally valid’ ways of knowing the world, with science being just one of them” (Boghossian 2006a: 2). The relativist’s key claim is that either we can chauvinistically maintain that our epistemic system is superior to all or accept the equal legitimacy of varying epistemic systems.