A related issue concerning narrative that has been a focus of debate is whether all films have narrators, including those without explicit ones.  Initially, it was argued that the idea of a narratorless narrative did not make sense, that narration required an agent doing the narrating, who was the film's narrator.  In cases where there were no explicit narrators, an implicit narrator needed to be posited to make sense of how viewers gained access to the fictional world of the film.  Opponents responded that the narrator in the sense of the agent who gave film audiences access to a film's fictional world could be the filmmaker(s), so there was no need to posit such a dubious entity as an implicit narrator of a film.