Harry Potter and the Methods of Rationality

You lunatic, after today of all days do you really think I -

"Headmaster," Harry said, trying to look abashed, "what's wrong with me isn't that I keep quiet about abusive professors."

Professor Quirrell chuckled. "Not perfect, Mr. Potter, but good enough for your first day. Headmaster, did you stay long enough to hear about the fifty-one points for Ravenclaw, or did you storm out as soon as you heard the first part?"

A brief look of disconcertment crossed Dumbledore's face, followed by surprise. "Fifty-one points for Ravenclaw?"

Professor Quirrell nodded. "He wasn't expecting them, but it seemed appropriate. Tell Professor McGonagall that I think the story of what Mr. Potter went through to earn back the lost points will do just as well to make her point. No, Headmaster, Mr. Potter didn't tell me anything. It's easy to see which part of today's events are her work, just as I know that the final compromise was your own suggestion. Though I wonder how on Earth Mr. Potter was able to gain the upper hand over both Snape and you and then Professor McGonagall was able to gain the upper hand over him."

Somehow Harry managed to control his face. Was it that obvious to a real Slytherin?

Dumbledore came closer to Harry, scrutinizing. "Your color looks a little off, Harry," the old wizard said. He peered closely at Harry's face. "What did you have for lunch today?"

"What?" Harry said, his mind wobbling in sudden confusion. Why would Dumbledore be asking about deep-fried lamb and thin-sliced broccoli when that was just about the last probable cause of -

The old wizard straightened up. "Never mind, then. I think you're fine."

Professor Quirrell coughed, loudly and deliberately. Harry looked at the professor, and saw that Professor Quirrell was staring sharply at Dumbledore.

"Ah-hem!" Professor Quirrell said again.

Dumbledore and Professor Quirrell locked eyes, and something seemed to pass between them.

"If you don't tell him," Professor Quirrell said then, "I will, even if you fire me for it."

Dumbledore sighed and turned back to Harry. "I apologize for invading your mental privacy, Mr. Potter," the Headmaster said formally. "I had no purpose except to determine if Professor Quirrell had done the same."

What?

The confusion lasted just exactly as long as it took Harry to understand what had just happened.

"You - !"

"Gently, Mr. Potter," said Professor Quirrell. His face was hard, however, as he stared at Dumbledore.

"Legilimency is sometimes mistaken for common sense," said the Headmaster. "But it leaves traces which another skillful Legilimens can detect. That was all I looked for, Mr. Potter, and I asked you an irrelevant question to ensure you wouldn't think about anything important while I looked."

"You should have asked first!"

Professor Quirrell shook his head. "No, Mr. Potter, the Headmaster had some justification for his concerns, and had he asked for permission you would have thought of exactly those things you did not wish him to see." Professor Quirrell's voice grew sharper. "I am rather more concerned, Headmaster, that you saw no need to tell him afterward!"

"You have now made it more difficult to confirm his mental privacy on future occasions," Dumbledore said. He favored Professor Quirrell with a cold look. "Was that your intention, I wonder?"

Professor Quirrell's expression was implacable. "There are too many Legilimens in this school. I insist that Mr. Potter receive instruction in Occlumency. Will you permit me to be his tutor?"

"Absolutely not," Dumbledore said at once.

"I did not think so. Then since you have deprived him of my free services, you will pay for Mr. Potter's tutoring by a licensed Occlumency instructor."

"Such services do not come cheaply," Dumbledore said, looking at Professor Quirrell in some surprise. "Although I do have certain connections -"

Professor Quirrell shook his head firmly. "No. Mr. Potter will ask his account manager at Gringotts to recommend a neutral instructor. With respect, Headmaster Dumbledore, after the events of this morning I must protest you or your friends having access to Mr. Potter's mind. I must also insist that the instructor have taken an Unbreakable Vow to reveal nothing, and that he agree to be Obliviated of each session immediately afterward."

Dumbledore was frowning. "Such services are extremely expensive, as you well know, and I cannot help but wonder why you deem them necessary."

"If it's money that's the problem," Harry spoke up, "I have some ideas for making large amounts of money quickly -"

"Thank you Quirinus, your wisdom is now quite evident and I am sorry for disputing it. Your concern for Harry Potter does you credit, as well."

"You're welcome," said Professor Quirrell. "I hope you will not object if I go on making him a particular focus of my attentions." Professor Quirrell's face was now very serious, and very still.

Dumbledore looked at Harry.