the idea that you cant criticise or do commentary of a film that includes outside elements. like whiplash - in the screenplay the janitor took the folder, but in the movie, that info was omitted, thus raising the suspicion that fletcher took it. you cant critic or commnt that it was fletcher cause the screen play said so.
the fact that the director omitted it - is more loud - than the screenplay. but even that you cannot include as part of your argument for what happens in the film.\
everything in the film is its own universe, and thus precludes all elements outside of the film.
wonder if this is tied to simulation argumet or analysis...hmmm