Ken Jennings is a trivia master.
He’s the 2nd greatest earnings champion in JEOPARDY! history, but has won more overall game show earnings than any other contestant. He has a few books, of course – he even has his own CAN YOU BEAT KEN board game. He even won GRAND SLAM, the trivia contest that pitted all the top game show contestants against each other to see who truly was the best.
In interviews, Ken has said that nobody can really know it all, and there were a number of Jeopardy! questions that he simply guessed the answers to. Granted, they were highly educated guesses – but they were guesses nonetheless.