World Rules Refined

A couple of comments on this post inspired me to refine the concept of Rules of the World (ROTW).

I think there is a distinction between rules that define how world of the play would function if it were reality, and rules that define the conventions of how the play is presented to the audience.

The question "What is the role of women in the 'world'?" and my question "Where do the bodies end up?" fall into the former category. Pookie's observation about time and Erik's thoughts on language fall into the latter category.

I tend to think first about the reality of the world I want to write about, and then what conventions I'm going to use to convey those to the audience.

I recall a day in workshop at Ohio University. I had written a play with a ghost. (Really, its better than it sounds.) The workshop accepted the ROTW that ghosts were real. But Charles Smith went on to ask how the ghost manifested on stage: a special light, a sound, did the ghost always appear from one spot, etc. He said in effect: "Fine, ghosts are real in this play. But how are you going to show that to the audience?"

Is this purely an academic distinction? Or is the line between ROTW and stage convention so blurred as to be useless?