When I anonymously mention my race online and someone says, "I don't believe you're black because you type too intelligently to be black," I sometimes genuinely have mixed feelings. Like, on one hand, fuck you for being a racist asshat, but on the other hand, if you take away the backhanded nature of this comment, all it's really saying is "You're quite articulate." Although, by the standards of anyone who says this, they probably have absurdly low expectations for black people because they likely haven't interacted with too many in real life. Their idea of what a black person is might be more likely to stem from 4chan memes. For these people, a black person knowing basic math could be enough for them to say this disgusting shit.