To be clear: I have no problem admitting that I author the vast majority of the world in the games I run, but I dislike the phrasing "the GM's notes" because it feels as though it is implying that the GM has planned a story, which seems like a railroad--or at least railroad-adjacent. I have less problem with your construction "the GM's conception of the world," but I realize it's both less pithy and less provocative.Interesting. To me it feels like a handful of posters, particularly you, object to any word or phrase anyone else comes up with - GM's notes, fiction (shared or otherwise), authorship, etc - that makes it clear without equivocation or metaphor that the fiction in RPGing has to be invented, and that in your favoured playstyle it is the GM who is doing the bulk of that invention.