Episteme
"Episteme" is a philosophical term derived from the Ancient Greek word ἐπιστήμη "epistēmē", which can refer to knowledge, science or understanding, and which comes from the verb , meaning "to know, to understand, or to be acquainted with".
Epistemicism
Epistemicism was historically considered an untenable position, since it requires vague terms to possess extremely specific conditions of application. Since the publication of Timothy Williamson's "Vagueness", which defended the view, it has been taken seriously by many philosophers working in the area.