[Personal view] A stupid question is typically one that has a built-in assumption or fallacy. For example, your question in the title isn’t stupid, until we include the body of the post; the body of the post contains an assumption (that this comm is against stupid questions, when the name of the comm instead conveys “no questions are stupid”), so it makes the question stupid.
So, oddly enough, the part of the question that might make it stupid is not the question itself.
Side note every bloody body does some damn stupid questions once in a while. So don’t take this “you’re question is of stupid!” as personal criticism. i.e. I could be the one asking the stupid question instead and I’m aware of this.