Or Dunke. Shortened form of DUNning-Kruger Effect which is "a cognitive
bias where by people of low ability have illusory superiority and mistakenly asses their cognitive ability as greater than it is." In other
words it's a person who is too dumb/ignorant to know how dumb/ignorant they are.
Usually used to describe"flat-earthers” or “young
earth creationists” who think they understand science and mathematics but miss concepts obvious to anyone with a
basic scientific or mathematical understanding of a principle.
It is pointless to argue or
try to show facts or evidence that falsify a dunk's belief in a thing because they lack the intellect to grasp certain concepts and
will ignore the evidence if it goes against some other thing they deeply believe.