This depends - even if the diadem really does make you smarter, it is entirely possible that Rovena exhausted all the low-hanging fruit available for using magic to improve cognition - For example: If what the diadem does is use healing and vertiaserum type effects to keep your brain in peak working condition (ideal blood sugar, magically eliminating waste toxins, ect, ect) and force you to be intellectually honest, that would allow you to think as quickly and as well as you do at your best all the time - which would be a huge upgrade - but it would not allow recursive improvements.
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 94. The previous thread has passed 200 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.
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: