He doesn't need to answer. Everyone knows he's using a teleprompter.
Watch for it Billy. If Biden shows up wearing a mask at the debates, I bet it is wired with a radio receiver and earbud to feed him keywords while talking to help him out of tough situations when he gets stuck.
Oh, that would be so funny! Can't you just see Biden wait awkwardly for an answer in his ear bud, then, instead of answering the question, He would put his hand to his ear and say, "Can you repeat that?" That would be priceless.