Relativists about science also point to the prevalence of both synchronic and diachronic disagreement among scientists as a justification of their view. Looking at the history of science, Kuhn and his followers argued that Aristotelian physics presupposes a totally different conception of the universe compared to Newtonian physics; the same is true of Einsteinian physics compared to its predecessors. Moreover, these differing conceptions may be incommensurable in the sense that they are not readily amenable to comparison or inter-theoretical translation. There are also strong and unresolved disagreements between scientists working contemporaneously. The many different interpretations of quantum mechanics are a case in point.