Okay, so I like everyone else's comments, but they feel complicated with what I came up with:
Harry convinces himself of #2 enough to say it in parselmouth.
Harry says "I think I understand the prophecy you're trying to avoid, and I believe killing me makes it happen. I would say more, but you'd probably use it to kill me" in parselmouth.
Harry stays silent.
You should be more explicit in Step 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 113.
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.)
IMPORTANT -- From the end of chapter 113: