blind, v.³ — Green’s Dictionary of Slang

blind v.³

[? one ‘blinds’ them with one’s own knowledge]

(US campus) to expose another’s ignorance.

1916		DN IV 343: Blind [...] To expose (one’s) ignorance. ‘Professor — blinded me today on Latin.’.
1946		(con. 1912) PADS 6 6: Blind [...] To ask questions that students are unprepared to answer.