You know those pain-in-the-neck charity solicitation calls from the nice-sounding person who kinda doesn't sound real? You're too polite to just hang up, so you ask if the person is real or a recording, and the answer, sounding recorded, goes something like, "No, I'm a real person. I'm just using my computer."
Ask the nice-sounding person to add two plus two. I haven't found one yet who can do that.