> Verb forms agree with the grammatical number of the subject, independent of the semantic number That's what I find interesting: that "they" isn't actually be

> Verb forms agree with the grammatical number of the subject, independent of the semantic number That's what I find interesting: that "they" isn't actually being used grammatically as a singular pronoun that can be dropped in to replace "he" or "she." The entire grammatical construct is exactly the same as if "they" was referring to multiple people. It's the context that makes it clear that only a single person is being referred to.