Update: Discussion has moved on to a new thread.
The load more comments links are getting annoying (at least if you're not logged in), so it's time for a new Harry Potter and the Methods of Rationality discussion thread. We're also approaching the traditional 500-comment mark, but I think that hidden comments provide more appropriate joints to carve these threads at. So as of chapter 67, this is the place to share your thoughts about Eliezer Yudkowsky's Harry Potter fanfic.
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. The fanfiction.net author page is the central author-controlled HPMOR clearinghouse with links to the RSS feed, pdf version, TV Tropes pages, fan art, and more, 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:
You do not need to rot13 anything about HP:MoR or the original Harry Potter series unless you are posting insider information from Eliezer Yudkowsky which is not supposed to be publicly available (which includes public statements by Eliezer that have been retracted).
If there is evidence for X in MOR and/or canon then it's fine to post about X without rot13, even if you also have heard privately from Eliezer that X is true. But you should not post that "Eliezer said X is true" unless you use rot13.
I just figured out a possible bit of twisty logic while listening to the podcast that I didn't notice on first read through.
I've spoilered this entire thing even though I probably don't need to, just so that you can can figure it out yourself If you want. I think it explains Dumbledore's otherwise incomprehensible behavior in chapter 17.
Cebsrffbe Qhzoyrqber frg hc gur ragver guvat jvgu Uneel'f Nhag, naq ur ncbybtvmrq sbe znavchyngvat guvatf va gung snfuvba. Naq Uneel qvqa'g haqrefgnaq vg orpnhfr Qhzoyrqber vf n ovg qvfgenpgvat.
Cbvag 1: Uneel'f Nhag Crghavn qenax n cbgvba sebz Yvyl Cbggre gung znqr ure fvpx sbe jrrxf, naq gura zber punevfzngvp.
Cbvag 2: Ba svefg ernqvat, V gubhtug "Bu ybbx, n Q&Q ersrerapr naq Qhzoyrqber vf whfg orvat enaqbz."
Ohg npghnyyl, Rntyr'f fcyraqbe vf n fcryy juvpu obbfgf punevfzn. Naq vg'f vzcyvrq gung Gurfgeny oybbq jbhyq punatr vg gb znxr lbh fvpx sbe jrrxf.
Naq...
Cbvag 3: Cebsrffbe Qhzoyrqber grnef urer vaqvpngr ur srryf crefbanyyl erfcbafvoyr sbe Uneel'f ragver fvghngvba. Gung qbrfa'g znxr nal frafr, hayrff ur npghnyyl unq qbar fbzrguvat .