Without a quantifiable difference in what is viewed as mundane vs magical in a given world there can be no meaningful difference. Without a frame of reference the is no difference between mundane and magical.
I'm still not 100% sure I get it. Does this mean that each group has to figure out what is magic and what's not for themselves? If that step is taken, then we should be able to supply that frame of reference.
eg. In my game I say that Come and Get It isn't magical. That means that, in this world, it's possible to... I don't know, learn a Dune-style "Voice" skill as a martial talent that nothing can resist. (Oh, I had a cool idea for my campaign world... I'll sblock it.) Does that give us a frame of reference to draw a line between mundane and magical in this game world?
[sblock=cool idea]My thinking is that the world is formed from "primordial" chaos, given form and order by the Gods. Everything, even dirt, has a bit of that primordial spirit. Magic manipulates the form (and uses Supernal as its language), but with a force of will you can manipulate the primordial spirit in anything.
Come and Get It might be exerting that will. Which makes it "magic", but since everything's magic anyways, there's no real difference. Huh. Well, I thought it was a neat idea.
I also like the idea of a fighter Intimidating a rock wall into opening up for him.[/sblock]
Does this make it more difficult for meaningful choices to arise? (Given the "player challenge" critera for meaning.) Maybe, maybe not. Especially not if the players are interested in exploring the DM's world and learning about what works and what doesn't.
A set of simple rules along with a good dose of guidelines to produce sensible rulings is pure heaven. There are terrible DMs out there that have led to outcry of "mother may I" games being no fun. I say that if you don't trust the DM to make sensible rulings then perhaps gaming with this person isn't worth the effort. Complex rules won't stop jerks from being jerks. If large tight ruleset is required to keep anyone at the table "in line" on either side of the screen then fun has already been assassinated and it isn't going to help.
Agreed.