They're also in an environment where creating an artificial persona is not merely useful, but a fundamental survival tactic: each of these characters would be dead by now if they were not Occlumens (and Lord Mafloy is an Occlumens, see chapter 47), which requires the person to also juggle a separate and highly artificial persona.
And of course, McGonagall acts similarly, even though her reaction is not similarly perfect, possibly because she's not a perfect Occlumens (and had just dealt with a full day of Rationalist!Harry).
There's some correlation between IQ and various measures of social awareness, despite the stereotype to the opposite, but it is a learned ability and many experts either don't learn it, or harness it to different ends. Feymann's writings on public speaking and instruction suggest that he, for one example, was highly aware of how he made his words and how his public face appeared. At the same time, I'm not sure how much of that was foresight and how much was later introspection -- and artificially controlling the flow of a Congressional inquiry may be less 'creepy' than artificially controlling the flow of information to an eleven-year-old.
((Yudkowsky's style may be part of the issue, as well. As in /Three Worlds Collide/ and /Sword of Good/, character dialogue, even from 'normal' characters, comes across as artificial at times. That more than the complexity of thought may trigger the creepy vibe.))
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 97. The previous thread is at nearly 500 comments.
There is now 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.)
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: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25.
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: