That would apply to a lot of entries of this list, which is a really interesting read: https://en.wikipedia.org/wiki/List_of_common_misconceptions

About 9/11 or actually any other major event: you typically get a lot of contradictory witness statements with so many people. The real picture only emerges when you have analyzed a lot of statements and looked at evidence. Thus early reporting often relies on a few statements that are found to be wrong later - perfect fuel for a conspiracy theory.

Considering how much heat the servers probably generate, ChatGPT might have a decent chance in that competition 😁