 This, Plantinga argued, epistemically defeats the belief that naturalistic evolution is true and that ascribing truth to naturalism and evolution is internally dubious or inconsistent.In a 1998 paper Branden Fitelson of the University of California, Berkeley and Elliott Sober of the University of Wisconsin–Madison set out to show that the arguments presented by Plantinga contain serious errors.Plantinga construed evolutionary naturalism as the conjunction of the idea that human cognitive faculties arose through evolutionary mechanisms, and naturalism which he equated to atheism.