Versions already mentioned somewhere: "It was sad she died", "Harry, now you don't owe anything to House Malfoy anymore", "Father wants to disband Hogwarts because it's not safe anymore, Wizengamot vote is tomorrow".
My guess: the rationality-theme of this arc is roles, and this is relevant in almost every chapter. Probably something about Lucius playing a role of loving father instead of going off-script? Or Lucius playing the role of important Wizengamot member?
My second guess: it is connected to the (former?) belief of Lucius that Harry is Voldemort. Role of Death Eater overriding Lucius's neocortex?
Third guess: "Harry, you remember the vow you gave to me about murderer of Narcissa Malfoy? Listen carefully. I swore to find the murderer of Hermione Jean Granger and..."
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: