Both of them described a dark ritual in terms of what the other gave up, then what the other got.
Per what Lily says, Voldemort gives up killing Harry, in exchange for Lily's life.
Per what Voldemort says, Lily gives up her life, in exchange for Harry's life.
Does this mean there were two different rituals proposed? The same one from two perspectives? I don't think we have enough of the theory of dark rituals to distinguish the two. Did Lily "get it wrong"? Under one possible interpretation, yes, and under another, no.
And then Lily may or may not have balked at the terms, and tried to kill Voldemort, and Voldemort may or may not have tried to kill Harry.
Harry really should have been investigating the details of Voldemort's death a lot more than he has, starting with an interrogation of Dumbledore.
Fair enough; I didn't think of the "sacrifice the chance to kill Harry in order to obtain the death of Lily" interpretation. Which I still think is inelegant but I have no good argument against it, so it has a right to exist.
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 95. The previous thread has passed 300 comments.
There is now 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.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system.
Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.
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: