Reformed epistemology is a view about the epistemology of religious belief, which holds that belief in God can be properly basic. Analytic philosophers Alvin Plantinga and Nicholas Wolterstorff develop this view. Plantinga holds that an individual may rationally believe in God even though the individual does not possess sufficient evidence to convince an agnostic. One difference between reformed epistemology and fideism is that the former requires defence against known objections, whereas the latter might dismiss such objections as irrelevant. Plantinga has developed reformed epistemology in "Warranted Christian Belief" as a form of externalism that holds that the justification conferring factors for a belief may include external factors. Some theistic philosophers have defended theism by granting evidentialism but supporting theism through deductive arguments whose premises are considered justifiable. Some of these arguments are probabilistic, either in the sense of having weight but being inconclusive, or in the sense of having a mathematical probability assigned to them. Notable in this regard are the cumulative arguments presented by British philosopher Basil Mitchell and analytic philosopher Richard Swinburne, whose arguments are based on Bayesian probability. In a notable exposition of his arguments, Swinburne appeals to an inference for the best explanation.