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 96. The previous thread is at almost 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:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it’s fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that “Eliezer said X is true” unless you use rot13.
I thought about this for a while too, more than five whole minutes by the clock, and eventually I came up with a possible explanation.
It's not that Lily sacrificed herself for her child. As you and uncountable other people pointed out, that must have happened innumerable times throughout history, even just among the witches and wizards. It's that she sacrificed herself for her child when she could have lived.
Think of the oddness of the situation. The murderer arrives to kill the child, but not the mother. How often is that the case, historically? Then the murderer offers the mother a chance to live when she gets in his way, which is still stranger. When she rejects the offer to try to save her child, he does not bother to subdue her, but then chooses to kill her, which invalidates basically all of the explanations that I could think of that fit the above two criteria.
It's not that she sacrificed herself for her child--it's that the killer came with the express purpose of killing the child but sparing the mother, and she deliberately threw away that chance for her child. It never would have worked if he had come with the intent to kill her as well.
Which implies that Snape's request was what was needed to give Lily that opening. Which further implies that Snape really did save Wizarding Britain, if accidentally.
I don't believe I've shared the theory here before, I look forward to seeing if there are holes in the story that I have not yet discovered.