The correct answer for me is my wife. Oh, famous, right. A famous person, I might pick a living X-president of the U.S. I am assuming that the conversation will be off the record and that he will speak honestly. Probably a bad assumption. But I would ask about that first day in office. How shocking is it to learn what a president must know to lead the country. Is there a presidents book. Are there extra-terrestrial beings among us .
Now, if the deceased were included in this elevator scenario, I stick by Marilyn Monroe, with Hedy Lamarr as a close second. Beauty and brains, what a combination !