Do you have an example of this happening?
Ron's disguise in the book 7 Gringrotts break-in was a transfiguration (as contrasted to the polyjuice used by Hermoine), and explicitly removed by Thief's Downfall. It's not clear that Rational!Harry's transfiguration operates by the same rules as conventional ones, and could have been stored in some way to protect against exposure, but this provides both narrative and practical evidence against the theory.
I expect that point of the pen is to demonstrate to Lord Malfoy that a) Harry is a man of his word, and thus his words are worth examining, and b) Harry is a man of /exactly/ his word, and thus worth respecting.
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 97. The previous thread is at nearly 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, 19, 20, 21, 22, 23, 24, 25.
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: