You're making assumptions, but are completely positive I have "no proof". I'm drawing a conclusion based upon the facts at hand. I have no knowledge of, and apparently neither do you, of Palin debating anyone privately, but certainly no one publicly, since her debate with Biden.
So, you're completely positive she's a more experienced debater but can't demonstrate any place she's debated or proffer anyone that has been her debate opponent. I hope you're not a scientist.
My assumption has some merit and I am awaiting your answer from which you drew your conclusion, Einstein.