Voldemort had the ability fly free from his body. The last sentence you quote is Harry thinking that he mustn't allow that to happen, not that V doesn't have the capability. If V goes free then he must be defeated again; Harry is avoiding that outcome.
Voldemort had the ability fly free from his body.
At least, Harry thinks that he did. (The last sentence I quoted is the section that I had misinterpreted as evidence that he couldn't, but I wouldn't take Harry's speculations as the most likely possibility instead of a conservative estimate.)
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 114, and also, as a special case due to the exceptionally close posting times, chapter 115.
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.)