wronghead means A person of a perverse understanding or obstinate character. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
Why “wronghead” is a great word
WRONGHEAD — [Noun] A person of a perverse understanding or obstinate character. From wrong (meaning "incorrect" or "not in accordance with truth or fact") + head (meaning "mind" or "intellect"). First attested in 1729 in the writing of Bernard Mandeville. Unlike a "wiseacre," who affects knowledge, or an "idealist," who is misled by lofty principles, the wronghead is distinguished by a sincere, intractable fidelity to erroneous logic. This is the neighbor who champions a failed policy with serene conviction, the artisan who defends a flawed technique as sacred, and the scholar who builds an elegant proof upon a single, defended fallacy—a testament to the immense, tragic energy spent making a home in one's own error.
Etymology
From wrong + head.
noun
- A person of a perverse understanding or obstinate character.