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mis‧tak‧en

1 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.
I thought he said 12 o'clock, but I might have been mistaken.
be mistaken
It can't have been my car. You must be mistaken.
I thought he said 12 o'clock, but I might have been mistaken.2 a mistaken belief etc is not correct :
Marijuana has few withdrawal effects, and this has given rise to the mistaken belief that it is not addictive.
mistaken belief/idea/impression/view etc
Marijuana has few withdrawal effects, and this has given rise to the mistaken belief that it is not addictive. —mistakenly adverb
