Although the rules have been thoroughly play-tested over a period of many months, it is likely that you will eventually find some part that seems ambiguous, unanswered, or unsatisfactory. When such situation arises settle it among yourselves, record the decision in the rules book, and abide by it from then on. These rules may be treated as guide lines around which you form a game that suits you. It is always a good idea to amend the rules to allow for historical precedence or common sense -- follow the spirit of the rules rather than the letter.-Chainmail, 3rd edition, page 8, by Gary Gygax & Jeff Perren
I love this passage because the reader is not directed to the authority of the designer nor that of any referee. The text assumes that the players are adults capable of arriving on a consensus on their own and achieving at least as useful rulings as the authors of the game.