Typical Dumpy gish galloping. First he tells a lie, when he gets called out on it he presents another lie, a double-headed hydra of a lie.
At first there's people say, then we go on to manuals and books. If he was to be asked about the manuals and the books, he'd have something new and completely made-up to say about that too (no I didn't watch the interview because I can't handle my brain exploding quite so much quite so many times thankyou...)
Possibly he'd make up something completely irrelevant, because he can't stay on topic for shit either, because he's maybe demented, and/or because he knows he's in trouble so he needs to deflect somehow. Anywhere else, because it would probably be an improvement.