He wouldn't have had enough information to conclude that Harry had invented a new type of Transfiguration - he would probably think it was a particularly powerful cutting hex for a first year, or something. Still stupid of him not to have made inquiries after two times witnessing its effects (cutting through the wall of Azkaban, felling the trees).
Especially knowing that Harry almost offered to explain it to him (after Azkaban). Quirrel's answer :
it is too rare that I find a person whom I cannot see through immediately, be they friend or foe. I shall unravel the puzzles about you for myself, in due time.
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 117.
Plans for next chapter release:
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.)