In canon, the Department of Mysteries has a room filled with preserved brains, presumably for research. For unexplained reasons, it includes a quick connection to the death room (where the vale is located). Ron, under the influence of an unknown mind-altering spell (confunding?), summoned one of the brains, and it attacked him with a silvery substance that sounds like a more solid version of the typical memories put into pensives. (This left scars, and seemed to break Ron out of the spell before silencing him.). Later, someone (I forget who, but a member of the Order of the Phoenix) commented that Ron would be fine, but the marks left by thoughts were deep--implication being that the silvery ribbons that came from the brain and grappled him were thoughts.
We don't know, based just on that evidence, that the Department of Mysteries can preserve human brains, or that said brains are capable of some form of thought in that state. What we do know is that they had tanks of the brains (I seem to remember it being several tanks, but I'm not sure), they seem to be in good condition for all that non-neurologist Harry can tell, and that they resisted Ron's accio with a projection that a knowledgeable wizard described as thoughts.
It makes me wonder what would happen if MoR Harry broke into the Department of Mysteries in his current state. (You know, in the few minutes before he found a way to open the "no, seriously, do not open this door" door and destroyed the universe.)
Unlikely to ever make an appearance, due to meta-knowledge:
Jura Ryvrmre fgnegrq guvf fgbel, ur unqa'g ernq gur obbxf, naq gubfr fprarf qba'g nccrne va gur zbivrf. Jr nyfb xabj gung ur xarj rknpgyl jung unccraf sebz gur fgneg, fb ur unq guvf cynaarq orsber ernqvat nobhg gur QbZ oenvaf.
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 chapters 91 & 92 . The previous thread has passed 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.
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: