The phrase "wrong opinion" is correct and can be used in written English.
Example: Despite popular belief, Ella's argument was based on a wrong opinion about the effectiveness of the new policy.
That was a completely wrong opinion.
They gave the wrong opinion about Heydar Aliyev".
I think you have the wrong opinion about the owners of this club.
Olivia Warham Director, Waging Peace Gary Younge got it all wrong (Opinion, 7 October).
The mere fact that neocons favor something doesn't automatically make it the wrong opinion — and not all of the people who signed the letter are neocons.
The fifth objection is essentially that I should have embraced SSI instead of criticizing it, i.e. that I reached the wrong opinion.
However, those who hold wrong opinions are not therefore wicked or dim.
Because the world is full of idiots with barkingly wrong opinions, right?
She has recently opposed the trend among university societies for censoring feminists who have the "wrong" opinions on sex-work and gender.
Boughton, a sweet man in most respects, whose hair puffs off his head like "the endless work of dreaming", has wholly the wrong opinions about civil rights.
"I'm the first one to like jokes, but this kind of joke goes too far in that it helps contribute to wrong opinions among people who are far removed from all this, who don't know the system.
