Do we know it isn't? I mean, you have a very good point, and I didn't think of that problem - it is really not a secret you could plausibly keep for a thousand years, even with flawless commitment to family loyalty, because sooner or later someone will try to obliviate one of you and get away both alive and with their memory intact.
But on the other hand, Parsel-tongue seems like the kind of thing that's going to just accumulate rumors about it's properties like it was coated in velcro. Picking out which of the properties attributed to that ability are actually real from all the baseless rumors might be quite difficult. Especially if there are other defenses against obliviate.
.. And if defenses are possible, they have to exist. About 3 seconds after someone told me about memory charms and obliviate, I'd personally make "Become Safe From That Shit" priority number one, They're skincrawlingly, mindwarpingly awful spells. The kind of thing where if there isn't any other counters, I'd move to mars to preclude the possibility.
Hm. Point. It really depends on how rare Parseltongues were - I'm pretty sure the only ones left are Voldemort and, well, Voldemort, but that might well be because Voldy killed them all. If they used to be "uncommons" rather than "rares", to use the CCG terms, then I'd expect the true legends to stand out much more than if nobody really knew much of anything.
Two new short chapters! Since the next one is coming tomorrow and we know it'll be short, let's use one thread for both.
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 105 (and chapter 106, once it comes out tomorrow). EDIT: based on Alsadius' comment about thread creation for MOR chapters, let's also use this thread for chapter 107 (and future chapters until this nears 500 comments) unless someone objects to doing so. Given that this is the final arc we're talking about, thread titles should be updated to indicate chapters covered.
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.)
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: