Relativists about science have argued that only with the addition of auxiliary hypotheses could the scientist choose between various theories and that such auxiliary hypotheses are colored by socially and historically grounded norms as well as by personal and group interests. Paul Feyerabend’s “democratic relativism”—the view that different societies may look at the world in different ways and regard different things as acceptable (1987: 59) and that we need to give equal voice to these differing perspectives—is one instance of the use of the underdetermination thesis in support of relativism. According to Feyerabend, underdetermination ultimately demonstrates that