I think the title was redacted in order to not give the game away too early, as in Chapter 9.
Maybe the magical incompatibility is real, and perhaps the dark social engineering behind the Stanford Prison Experiment relates to Chapter 16, Lateral Thinking. In Ch16, there's almost the same words in all-caps dizzying his brain. It might be explained by the sense of doom and magical incompatibility. Also Ch16 has “Mr. Potter, I never said you were to kill. There is a time and a place for taking your enemy alive,..." If Quirrell senses similar doom on his side, framing Harry as the Dark Lord and almost capable of breaking his most trusted lieutenant out of Azkaban might be a cunning lateral-thinking plot to dispose of all but a fragment of his nemesis without using anything direct.
[Update: and now there's a fifth discussion thread, which you should probably use in preference to this one. Later update: and a sixth -- in the discussion section, which is where these threads are living for now on. Also: tag for HP threads in the main section, and tag for HP threads in the discussion section.]
The third discussion thread is above 500 comments now, just like the others, so it's time for a new one. Predecessors: one, two, three. For anyone who's been on Mars and doesn't know what this is about: it's Eliezer's remarkable Harry Potter fanfic.
Spoiler warning and helpful suggestion (copied from those in the earlier threads):
Spoiler Warning: this thread contains unrot13'd spoilers for Harry Potter and the Methods of Rationality up to the current chapter and for the original Harry Potter series. Please continue to use rot13 for spoilers to other works of fiction, or if you have insider knowledge of future chapters of Harry Potter and the Methods of Rationality.
A suggestion: mention at the top of your comment which chapter you're commenting on, or what chapter you're up to, so that people can understand the context of your comment even after more chapters have been posted. This can also help people avoid reading spoilers for a new chapter before they realize that there is a new chapter.