Ever played a match where a player swore up and down that a certain rule existed when it doesn't? One of my players once played a match where an opponent was utterly convinced that if you toss the ball and catch it with your racket before it bounces, that is a fault. I also had a lady go to the mat on the idea that you do not change sides after the first game in a set. It seems that one of the league coordinators had sent out an e-mail reminding everyone of the continuous play rule. Since this lady now understood that play must be continuous and you don't sit and drink after the first game, to her that meant you don't switch after the first game. I had my rules with me, but I simply couldn't find the right provision in the heat of the moment to show her, and I didn't want to spend a lot of time on it because we play timed matches. So I wound up serving first on one end and then serving the rest of the time from the other end. Because I knew she was completely and totally wrong, it bugged me the whole match.