In the philosophy of religion, Reformed epistemology is a school of philosophical thought concerning the nature of knowledge (epistemology) as it applies to religious beliefs. The central proposition of Reformed epistemology is that beliefs can be justified by more than evidence alone, contrary to the positions of evidentialism, which argues that while non-evidential belief may be beneficial, it violates some epistemic duty. Central to Reformed epistemology is the proposition that belief in God may be "properly basic" and not need to be inferred from other truths to be rationally warranted. William Lane Craig describes Reformed epistemology as "One of the most significant developments in contemporary religious epistemology ... which directly assaults the evidentialist construal of rationality."
Reformed epistemology was so named because it represents a continuation of the 16th-century Reformed theology of John Calvin, who postulated a sensus divinitatis, an innate divine awareness of God's presence. More recent influences on Reformed epistemology are found in philosopher Nicholas Wolterstorff's Reason within the Bounds of Religion, published in 1976, and Alvin Plantinga's "Reason and Belief in God", published in 1983.
