I think my concern is less about consistency, and more that I don't know how the LLM is deciding what is, for example, a "dystopian setting." Sure, it could be true that the percent of sci-fi movies since the 1950s that have a dystopian setting has increased from 11% to 46%. An alternate explanation is that the LLM is trained on more modern language, and so is better at detecting modern dystopian storylines. And with this method, we cannot know.