A man named Bob had a good friend named Joe. Bob noticed that Joe seemed to know everybody. They worked together, and would often get drinks together, go to events together; no matter where they went Joe was always busy saying hi and shaking hands with everybody. Bob would often ask, 'how do you know that guy?' and Joe would say, 'oh, I know everybody.' Bob got pretty used to Joe saying that, and usually left it alone. One day they went to another city for a work conference, and Joe was at it ag…