"Realism" and "Fairness" . . .
I'd also like to quote Chris (bankuei) from some posts of his on Matt's game blog.
"Unfortunately, there is not a single mainstream game that solidly lays out the idea of framing conflict outside of physics (even cinematic, anime, cartoon physics). We have zero mainstream examples to point people to in terms of reconsidering that resolution, and more importantly, conflicts, might be about something other than who can hit who, move faster, or carry more.
Regardless of how people in general feel about the various bits of the Big Model, [GNS theory] its most useful function is pointing out the differences and connections between system, people at the table, and imagined events- which is totally necessary for the purposes of understanding how to emulate something other than physics. It's utterly vital to break the myth that the imagined events "are real" or even need to be "realistic" in any sense. Once people recognize that it is the people at the table who create, and control the rules of creation- then it becomes open as any other art form."