Here's one of those opposite thingnames*, brought about by
the duplicity of the in- prefix
[in- + L. scire, to know]
1) now rare : lacking knowledge; nescient, ignorant
2) rare : having inward knowledge or insight
*Janus word, contronym, or enantiodrome
"In the thirties the Oxford mind was inscient."
- The Speaker, 10 Dec. 1898
Gaze on, with inscient vision toward the sun,
And, from his visceral heat, pluck out the roots
Of light beyond him.
- E.B. Browning, Aurora Leigh (1856)