Hmm, random speculation: does the death mark have the power to resurrect you? (in some, not necessarily preferred or pleasant form). And the Death Eaters cannot talk about it, unless you already suspect this is the case. This would fit Snape's response from ch. 86: :
But as you can see, the Dark Lord was quite cunning." His gaze grew more distant. "Oh," Severus breathed, "he was very cunning indeed..."
The Dark Lord had nearly the same level of cunning that Quirrellmort had in HPMoR. (A little less, since he was less experienced at the time.) That alone would explain Snape’s response.
Some sort of resurrection power of the Dark Mark is very unlikely, given that Voldemort is strongly predisposed not to give that sort of power to others. (Identified as one of his weaknesses in chapter 108.)
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 117.
Plans for next chapter release:
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.)