"No, I mean... what is a mutant? I mean, you all have to register with this law right? But mutants are monitored by giant robots. So...what kind of mutant is it? Are they toxic waste monsters or dangerous or something? Like something more dangerous than other metas? Did they get their powers from being altered by radiation or chemicals or something, as opposed to just being Homo Magi, born with powers or getting their powers triggered like a lot of metas are?"

"Mutant" tended to be a "that guy got hideously mutated by those chemicals!" kinda thing, and not "someone born with powers" and he hadn't figured out what exactly she was talking about.

He had NO idea what she was talking about.