Yes... But when pressed for details he said it didn't matter. He laughed condescendingly at the idea anyone would wonder about his credentials, and insisted that the narrator drop the whole thing and judge the the baby robot hypothesis on its own (cough, cough) merits.
He then reiterated the fact that the burden of proof was on the narrator for claiming the egg contained a bird, denied half the claims he'd made earlier, and blamed the narrator for bringing the whole thing up.
The narrator ran back into his house and locked the door, wondering whether the child even cared about whether or not the egg contained a robot. Even a coherent but illogical discussion would have been nice - but instead the boy had lowered himself to making and retracting/denying the existence of various random claims so quickly that it became clear he was purposefully wasting the narrator's time.
Does that answer your question?