branch of philosophy concerned with the nature and scope of knowledge
Epistemology ( (listen); from Greek ἐπιστήμη, epistēmē 'knowledge', and -logy) is the branch of philosophy concerned with knowledge. Epistemologists study the nature, origin, and scope of knowledge, epistemic justification, the rationality of belief, and various related issues. Epistemology is considered one of the four main branches of philosophy, along with ethics, logic, and metaphysics.Debates in epistemology are generally clustered around four core areas:
The philosophical analysis of the nature of knowledge and the conditions required for a belief to constitute knowledge, such as truth and justification
Potential sources of knowledge and justified belief, such as perception, reason, memory, and testimony
The structure of a body of knowledge or justified belief, including whether all justified beliefs must be derived from justified foundational beliefs or whether justification requires only a coherent set of beliefs
Philosophical skepticism, which questions the possibility of knowledge, and related problems, such as whether skepticism poses a threat to our ordinary knowledge claims and whether it is possible to refute skeptical argumentsIn these debates and others, epistemology aims to answer questions such as "What do we know?", "What does it mean to say that we know something?", "What makes justified beliefs justified?", and "How do we know that we know?".
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