On /r/HPMOR, some have been speculating that Dumbledore coated the Philosopher's Stone with Bahl's Stupefaction, which you might remember from chapter 63:
"Bahl's Stupefaction," Moody said, naming an extremely addictive narcotic with interesting side effects on people with Slytherin tendencies; Moody had once seen an addicted Dark Wizard go to ridiculous lengths to get a victim to lay hands on a certain exact portkey, instead of just having someone toss the target a trapped Knut on their next visit to town; and after going to all that work, the addict had gone to the further effort to lay a second Portus, on the same portkey, which had, on a second touch, transported the victim back to safety. To this day, even taking the drug into account, Moody could not imagine what could have possibly been going through the man's mind at the time he had cast the second Portus.
This would explain why Voldemort let Harry keep his wand after swearing the Unbreakable Vow, and now also might explain Harry's recent actions.
Voldemort, having spent more than five minutes looking into weaknesses, has figured out how to be immune to things that are common knowledge.
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 116.
There is 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.)