He doesn't want to be MISTAKEN
for a gang member.
The Big Bang Theory Season 7, Episode 3
And your son, if I'm not MISTAKEN,
Game of Thrones Season 3, Episode 7
No, you're MISTAKEN.
The Big Bang Theory Season 2, Episode 8
If the boy thinks he can frighten me,
Game of Thrones Season 5, Episode 3
i-if I'm not MISTAKEN,
The Big Bang Theory Season 12, Episode 23