Greek 'episteme' (knowledge) + 'logos' (study) — where 'episteme' means 'to stand upon,' knowledge as firm ground.
The branch of philosophy concerned with the theory of knowledge, especially regarding its methods, validity, scope, and the distinction between justified belief and mere opinion.
Coined in English from Greek 'epistēmē' (ἐπιστήμη), meaning knowledge, scientific knowledge, or understanding, combined with '-logia' (study of). Greek 'epistēmē' derives from 'epistasthai' (ἐπίστασθαι), meaning to know, understand, or be skilled in, composed of 'epi-' (upon, over) and 'histasthai' (to stand, set oneself), from 'histanai' (to cause to stand), from Proto-Indo-European *steh₂- (to stand). Knowledge, etymologically, is the state of standing
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