A rule in a game. Most Human Systems can be thought of as games. Ergo most "laws" we run across should at least on occasion be thought of as game-rules as arbitrary as any in a fun-game like Monopoly, tic-tac-toe, dodge-ball, or Mutually Assured Destruction.
- whether this implies you should take such rules less seriously (Rule Of Law, Game Playing) is open to question
The Nomic Game is intended to teach this.