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you are wrong is the most popular phrase on the web.

you are mistaken 183,500 results on the web	you are wrong 11,730,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Wrong or incorrect in opinion, understanding, or perception. 2. Based on error; wrong: a mistaken view of the situation. mis·tak′en·ly adv. American Heritage® ... 1. be mistaken. if you are mistaken, you are wrong about something that you thought you knew or saw : It can't have been my car. You must be mistaken. "You are mistaken," answered Pittacus. It would perhaps be nearer the truth to say that the secular and spiritual interests intermingled and so permeated one ... Feb 13, 2012 ... I don't know what rules apply here but my stomach tells me the latter is (at least also) correct, although you would say "you are mistaken".	Anyway, I think you are wrong about the great sage. And I pray to stuffing that you are wrong. But you are wrong, I'm still alive. Maya, you are wrong on this one. And if you think otherwise, then you are wrong. Commander... I think you are wrong. If we waste time going there and you are wrong... You think our marriage weakens me, you are wrong.

you are mistaken

183,500 results on the web

you are wrong

11,730,000,000 results on the web

More popular!

Wrong or incorrect in opinion, understanding, or perception. 2. Based on error; wrong: a mistaken view of the situation. mis·tak′en·ly adv. American Heritage® ...
1. be mistaken. if you are mistaken, you are wrong about something that you thought you knew or saw : It can't have been my car. You must be mistaken.
"You are mistaken," answered Pittacus. It would perhaps be nearer the truth to say that the secular and spiritual interests intermingled and so permeated one ...
Feb 13, 2012 ... I don't know what rules apply here but my stomach tells me the latter is (at least also) correct, although you would say "you are mistaken".