Oooohhhhhhh. Right. See, at some point in the past 5 1/2 years I may have told him, jokingly, that I can read his mind. And while he's an excellent snark protege so far, he's still only 5. And, unlike that time when I told him I had eyes in the back of my head, and then he pulled up my hair and checked, and was able to confirm for himself that I was lying, there's really no confirmation test for telepathy that he could do. Sorry, dude.
I gave him cake.