I have always considered a narrative a story...and a story can be fictitious or true...But I always thought a truth was a truth...So it seems a narrative can be vs. a truth.......if the narrative is just that...a story...it can be a fake story...it can be a story written to attempt to bring truth to a fake story....The main word being attempt......by adding supposition to the story line you have gone from a factual true story to a made up story by adding supposition to the basic story since supposition IMO is not a fact....So it seems to me a narrative can be a non truth....a fake story...