And unfortunately, in a serial you can't go back and change these things if you realize that you needed to foreshadow them a few chapters back.
I don't think that's how Eliezer treats it. The reference to the centaur forecasting that giving Petunia the beauty portion will end the world, that's in the first chapter wasn't there at the start but was added later.
It was there on day 1.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 112.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: