diagonalizing

To diagonalize somebody means, for example in psychotherapy, to point out incoherence / inconsistency in somebody's beliefs, also can be used in an argument in a more confrontational manner. Speaking in terms of computer science and math, diagonalization is related to stuff like: Lawvere's theorem, oracles, proof by contradiction

Timi: u need to stop diagonalizing ppl so bad bro, nobody understands nothin man; and them hoes get "the ick" if u know what I'm sayin
Myself: aight my bad gang. I appreciate ur kind feedback but Timi, if nobody understands nothin as u say, how come ur able to say this to me? Maybe it really makes sense :D
Timi: here we go again :)