That's not quite what you're doing though. You said that a core mechanic 'isn't a rule'. I would think that it certainly is a rule, perhaps the ruley-est of rules in a given game. All those bits in an RPG that tell you what dice to roll definitely rules. I have no problem saying that the core mechanic is a very important rule, but its importance doesn't alter is nature.I'm not sure why you wouldn't distinguish between some rule and the core mechanic of a game. A rule is an implementation of or a exception to the core mechanic.
But we did this thread a while back with similar blurred lines between the two.







