I don't have a good solution. I just know I don't like how the article defines stupid/intelligent, and that "stupid/smart" have a lot more (often hurtful) connotations than what they really mean.

But then you have the problem of going down the PC rabbit hole where you can't say anything about whether someone is smart or not, and have to live in a pretend world where everyone is the same intelligence even though they're not. So that's no good either.