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".
Epistemocracy
Another use seems to be in relation to modern science or western technocracy: "...the social promotion and political em-powerment of a new class of experimental scientists ... what sociologists of science like Blumenberg call an epistemocracy." Again this is more or less opposite to Taleb's use. However it would be unfair to say that any of these have exactly caught on either. It remains a word used in an ad hoc manner.