So the Witches (when compared to Double Witches) aren't analogous to Muggles (when compared to Witches); they're analogous to people. Although we have heard rumours to the contrary, we Muggles tend to just think of ourselves as people, and any Witches that there may be are a special class of people; however (according to some versions of the rumours) there are actually quite a few Witches whom we would never perceive and therefore never even count as people. Similarly, although Witches have heard rumours to the contrary, they tend to just think of themselves as Witches, and any Double Witches that there may be are a special class of Witches; however (according to some versions of the rumours) there are actually quite a few Double Witches whom they would never perceive and therefore never even count as Witches.
Update: Discussion has moved on to a new thread.
The hiatus is over with today's publication of chapter 73, and the previous thread is approaching the 500-comment threshold, so let's start a new Harry Potter and the Methods of Rationality discussion thread. This is the place to discuss Eliezer Yudkowsky's Harry Potter fanfic and anything related to it.
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: one, two, three, four, five, six, seven. The fanfiction.net author page is the central location for information about updates and links to HPMOR-related goodies, and AdeleneDawner has kept an archive of Author's Notes.
As a reminder, it's often useful to start your comment by indicating which chapter you are commenting on.
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: