Trolls already use continuous transformation on themselves; to find a needle in a haystack with a magnent, you first have to suspect there is a needle. Harry's partial transfiguration attempt(did that happen or...?) is probably more like a needle in a haystack of troll-magic. The only people who I think could spot it without knowing what they're looking for...already know about partial transfiguration.
Edit: and then Dumbledore finite's the acid to prevent transfig. sickness. any chance of anyone else figuring it out by looking at the magic involved will be looking for a needle without a magnent.
You would suspect that something strange happened (worthy of an autopsy) if a first year killed a troll... unless of course he just snapped his fingers :)
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 88-89. The previous thread has passed 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.
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: