system
Given the following post, respond as if you're commenting on Reddit:
human
[General] Do fictional cities replace/overlap real-world cities?

So, fictional cities that are not on the coast (because they can just add more land), do they a) *replace real-world locations in the real-world equivalent of that spot* or b) *somehow add more land in that location without changing the real-world land and cities around it*?
gpt
Sometimes all the cities are real. Sometimes it's all real except one or two additional cities that's in a spot where there isn't a city in real life. Sometimes it's all original except for a few major cities. And sometimes it's on a completely different planet entirely. It depends on the setting. Do you have one in mind?