Nine celebrities, seated in a three-by-three tier as in a tic-tac-toe board, joined two contestants one of them a champion in a game known best for the celebrities' witty answers to questions. The object was to win an otherwise standard game of tic-tac-toe by determining whether a celebrity was giving a correct answer to a general knowledge question or bluffing ("agree" or "disagree"). Contestants selected a celebrity, for which host Marshall read a question; a correct decision to agree or disag