basic philosophy epistemology 120 121 http://id.loc.gov/authorities/subjects/sh85072732 https://en.wikipedia.org/wiki/Category:Epistemology https://en.wikipedia.org/wiki/Epistemology https://www.wikidata.org/wiki/Q9471 BD143-BD237 The branch of philosophy concerned with the theory of knowledge. Epistemology is the study of the nature of knowledge, justification, and the rationality of belief. Much debate in epistemology centers on four areas: (1) the philosophical analysis of the nature of knowledge and how it relates to such concepts as truth, belief, and justification, (2) various problems of skepticism, (3) the sources and scope of knowledge and justified belief, and (4) the criteria for knowledge and justification. theory of knowledge