Qiaochu_Yuan comments on Harry Potter and the Methods of Rationality discussion thread, part 20, chapter 90 - Less Wrong

9 Post author: palladias 02 July 2013 02:13AM

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Comment author: Qiaochu_Yuan 03 July 2013 07:56:48PM 2 points [-]

That's probably why its origin was changed in HPMoR (where, as opposed to in canon, it was originally part of the Hogwarts security system and possibly made by Salazar Slytherin).