People working with definitions of words that the experts in the field don't share isn't the sort of contradiction being discussed. Things like the location of

People working with definitions of words that the experts in the field don't share isn't the sort of contradiction being discussed. Things like the location of towns, how physics works, history of a place. These are things that are expected to stay consistent, and when that expectation is broken, it needs to be handled with care. History being uncertain is one thing, but the author directly stating that history is X happened before Y and later in the story stating that Y happened before X creates a problem. If the author is purposefully going for an unreliable narrator or implying that history literally changed then that can work (if the author has the skill to pull it off), but having it change because the author forgot to stay consistent is quite immersion breaking and creates an issue of an unreliable author, which is much worse than an unreliable narrator. Can a language model keep straight things like "Kingdom M thinks X happened before Y" vs "X happened before Y"? Even humans commonly make mistakes with things like this.