 The proponents of each view have long striven to answer the concerns about their own view, and to show that the concerns about the alternatives cannot be adequately answered. Recently, methods from formal epistemology have begun to be recruited to examine the adequacy of these answers. We’ll look at some work that’s been done on coherentism and foundationalism, since these have been the focus of both informal and formal work. (For work on infinitism, see Turri and Klein 2014. See Haack (1993) for a hybrid option, “foundherentism”.)