I don't know why everyone is making this so complicated. Basically, the two words have opposite meanings. In context, "exonerate" means "absolve of", "indemnify" means "secure against". So in the original contract, the clause gets Harry off the hook, while Lucius' suggestion would change the meaning to have Harry still liable. He's just trying his luck because Harry is 11 and might not know big words.
Harry's not on the hook. The wording of the document is "exonerate House Malfoy of any involvement in Hermione Granger's death". Nobody's suggesting Harry should be exonerated of anything; this clause benefits the Malfoys only, and presumably "indemnify" would benefit them more.
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 97. The previous thread is at nearly 500 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, 25.
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: