Harry Potter and the Methods of Rationality

The holding cell, well to the center of Magical Law Enforcement, was luxuriously appointed; more a remark on what adult wizards took for granted, than any special feeling toward prisoners. There was a self-reclining, self-rocking chair with plush, richly textured, self-warming cushions. There was a bookcase containing random books rescued from a bargain bin, and a full shelf of ancient magazines, including one from 1883. As for toiletries, well, it wasn't exactly luxurious, but there was a spell on the room which put all that business on hold; you weren't to go anywhere that the watching Auror couldn't see you. But aside from that, it was quite a pleasant little cell. The Defense Professor of Hogwarts was being detained, not arrested, not even intimidated. There was no evidence to indict him... except that a terrible and unusual crime had been committed at the Hogwarts School of Witchcraft and Wizardry, and going by previous occasions the odds were five to one that the current Defense Professor was tangled up in it somehow. To this must be added the fact that nobody in the D.M.L.E. even knew who the Defense Professor was, and that the man had literally sneezed at all attempts to uncover his true identity. Why, no, they hadn't released 'Quirinus Quirrell' back to Hogwarts just yet.

Let us repeat this for emphasis:

The Defense Professor.

Was being detained.

In a cell.

The Defense Professor was staring at the watching Auror and humming.

The Defense Professor has not spoken a single word since he arrived in this particular cell. He has only been humming.

The humming started as a simple children's lullaby, the one that in Muggle Britain begins, Lullaby, and goodnight...

This tune was hummed, without variation, over and over, for seven minutes, to establish the underlying pattern.

Then began the elaborations upon the theme. Phrases hummed too slow, with long pauses in between, so that the listener's mind helplessly waits and waits for the next note, the next phrase. And then, when that next phrase comes, it is so out of key, so unbelievably awfully out of key, not just out of key for the previous phrases but sung at a pitch which does not correspond to any key, that you would have to believe this person had spent hours deliberately practicing their humming just to acquire such perfect anti-pitch.

It bears the same semblance to music as the awful dead voice of a Dementor bears to human speech.

And this horrible, horrible humming is impossible to ignore. It is similar to a known lullaby, but it departs from that pattern unpredictably. It sets up expectations and then violates them, never in any constant pattern that would permit the humming to fade into the background. The listener's brain cannot prevent itself from expecting the anti-musical phrases to complete, nor prevent itself from noticing the surprises.

The only possible explanation for how this mode of humming came to exist is that it was deliberately designed by some unspeakably cruel genius who woke up one day, feeling bored with ordinary torture, who decided to handicap himself and find out whether he could break someone's sanity just by humming at them.

The Auror has been listening to this unimaginably dreadful humming for four hours, while being stared at by a huge, cold, lethal presence that feels equally horrible whether he looks at it directly or lets it hover at the corner of his vision -

The humming stopped.

There was a long wait. Time enough for false hope to rise, and be squashed down by the memory of previous disappointments. And then, as the interval lengthened, and lengthened, that hope rose again unstoppably -

The humming began once more.

The Auror cracked.

From his belt, the Auror took a mirror, tapped it once, and then said, "This is Junior Auror Arjun Altunay, I'm calling in code RJ-L20 on cell three."

"Code RJ-L20?" the mirror said in surprised tones. There was a sound of pages being flipped, then, "You want to be relieved because a prisoner is attempting psychological warfare and succeeding?"

(Amelia Bones really is quite intelligent.)

"What'd the prisoner say to you?" said the mirror.

(This question is not part of procedure RJ-L20, but unfortunately Amelia Bones has failed to include an explicit instruction that the commanding officer should not ask.)

"He's -" said the Auror, and glanced back at the cell. The Defense Professor was now leaning in back in his chair, looking quite relaxed. "He was staring at me! And humming!"

There was a pause.

The mirror spoke again. "And you're calling in an RJ-L20 over that? You're sure you're not just trying to get out of watching him?"

(Amelia Bones is surrounded by idiots.)

"You don't understand!" yelled Auror Altunay. "It's really awful humming!"