Tennis Metaphor?...maybe

When Rosencrantz and Guildenstern are playing the questions game, they score it as if they were playing tennis. Tennis is traditionally scored staring with 15, then 30, then 40, and finally game. In tennis there comes a point where both players can have deuce, thus one of the players must score twice consecutively in order to win the game, or the game could go on forever. I think that the method in which Rosencrantz and Guildenstern choose to score the game represents their conversations, and their overall interactions and each one of them makes useful "points" here and there, but overall their arguing as they "hit the ball back and forth" gets them nowhere, and they end up in deuce.