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Longman Dictionary of Contemporary English
wrongheaded
adjective
EXAMPLES FROM OTHER ENTRIES
wrongheaded economic policies
▪ The young man's speech was full of wrongheaded ideas about "the evils of capitalism".
EXAMPLES FROM CORPUS
▪ Every aspect of administrative life is influenced by what is most fatuous, wrongheaded and vile.
The Collaborative International Dictionary
Wrongheaded

Wrongheaded \Wrong"head`ed\, a. Wrong in opinion or principle; having a perverse understanding; perverse. -- Wrong"head`ed*ly, adv. -- Wrong"head`ed*ness, n.
--Macaulay.

Wiktionary
wrongheaded

a. Having an obstinately (persistently, stubbornly) perverse/erroneous opinion or judgement. alt. Having an obstinately (persistently, stubbornly) perverse/erroneous opinion or judgement.

WordNet
wrongheaded

adj. obstinately perverse in judgment or opinion; "a wrongheaded policy"

Usage examples of "wrongheaded".

Rush, a champion of reform in education, thought Greek and Latin were outmoded and should be replaced with the study of modern languages, which Adams considered thoroughly wrongheaded.

As to your notion that the old tech would send us to different places from the Illuminated Ones, then it's either a wrongheaded notion, or that tech really is fucked by time…because we ended up following them right into the belly of their beast.

Your pursuit of the woman who, in all likelihood, struck back at that, is wrongheaded.

The other proceedings of Captain Sowle were equally wrongheaded and unlucky.

Elaida is wrongheaded to a fault, but I cannot believe her evil -- yet even if she is, trumpeting it will make outsiders suspicious of every Acs Sedai and drive the Black into deeper hiding.

Elaida is wrongheaded to a fault, but I cannot believe her evil -- yet even if she is, trumpeting it will make outsiders suspicious of every Aes Sedai and drive the Black into deeper hiding.