Her answers weren’t so “well rehearsed” after all, as she appeared to be glancing down and reading some of them.
My guess is the notepad was pre-loaded with notes and answers to questions. She seemed to be looking down and reading from that notepad all night. Too rehearsed. The “Cleaner” did not go and retrieve Trump’s notepad and hand that off to Holt. So we have this, the hand signals to Holt, the unidentified box and wire on Hillary’s back, the possible giving of questions to Ill before the debates, earpiece??? What else??(*&^^%