“Now Mr. Moore, this willfully disheveled, 63-year-old hybrid of Noam Chomsky and P. T. Barnum, expects theatergoers to pay Broadway ticket prices to watch him in a one-man show, The Terms of My Surrender. After his previous documentaries, books and television shows, does he have anything left to say, and does he really believe it will make a difference?” Dave Itzkoff goes to a rehearsal to find out.