That's a plausible answer as to why he couldn't make Sprout or Snape cast Imperius on Harry. But it doesn't explain why he seems to need Harry's active help.
He could just put Harry into a small, nonmagical cage or box, and float the box along, without his magic ever touching Harry directly. Or he could stuff Harry into the pouch, like Harry did to him in the Azkaban arc. (Granted, Harry can't turn into a snake.) If he needed Harry to be stunned for the duration, he could have told Harry to stun himself, threatening to torture the other students if he didn't.
I just made a mental connection - probably a stupid one. The pouch's capacity was recently expanded and Cedric has yet to make an appearence...
Two new short chapters! Since the next one is coming tomorrow and we know it'll be short, let's use one thread for both.
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 105 (and chapter 106, once it comes out tomorrow). EDIT: based on Alsadius' comment about thread creation for MOR chapters, let's also use this thread for chapter 107 (and future chapters until this nears 500 comments) unless someone objects to doing so. Given that this is the final arc we're talking about, thread titles should be updated to indicate chapters covered.
There is 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.)
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: