Originally Posted by Supernatural_Serve
The rules aren't based in common sense. They are based on principles of what is best for the game. That is a critical thing to understand and respect.
It seems we are losing the context of the original post. The premise was not to use common sense as a tool to invent rules or to give oneself an unfair advantage. Using common sense in that manner is simply cheating - end of discussion. However, my decision to call 'my point' on a caught ball behind the baseline (and it is my call) can be governed by my own common sense without causing cheating or gamesmanship. It can also make tennis more enjoyable by being a good sport.