Harry Potter and the Methods of Rationality

Chapter 16: Lateral Thinking

The enemy's gate is Rowling.

I'm not a psychopath, I'm just very creative.

As soon as he walked into the Defence classroom on Wednesday, Harry knew that this subject was going to be different.

It was, for a start, the largest classroom he had yet seen at Hogwarts, akin to a major university classroom, with layered tiers of desks facing a gigantic flat stage of white marble. The classroom was high up in the castle - on the fifth floor - and Harry knew that was as much explanation as he'd get for where a room like this was supposed to fit. It was becoming clear that Hogwarts simply did not have a geometry, Euclidean or otherwise; it had connections, not directions.

Unlike a university hall, there weren't rows of folding seats; instead there were quite ordinary Hogwarts wooden desks and wooden chairs, lined up in a curve across each level of the classroom. Except that each desk had a flat, white, rectangular, mysterious object propped up on it.

In the center of the gigantic platform, on a small raised dais of darker marble, was a lone teacher's desk. At which Quirrell sat slumped over in his chair, head lolled back, drooling slightly over his robes.

Now what does that remind me of...?

Harry had arrived at the lesson so early that no other students were there yet. (The English language was defective when it came to describing time travel; in particular, English lacked any words capable of expressing how convenient it was.) Quirrell didn't seem to be... functional... at the moment, and Harry didn't particularly feel like approaching Quirrell anyway.

Harry selected a desk, climbed up to it, sat down, and retrieved the Defence textbook. He was around seven-eighths of the way through - he'd planned on finishing the book before this lesson, actually, but he was running behind schedule and had already used the Time-Turner twice today.

Soon there were sounds as the classroom began to fill up. Harry ignored them.

"Potter? What are you doing here?"

That voice didn't belong here. Harry looked up. "Draco? What are you doing in oh my god you have minions."

One of the lads standing behind Draco seemed to have rather a lot of muscle for an eleven-year-old, and the other was poised in a suspiciously balanced-looking stance.

The white-blonde-haired boy smiled rather smugly and gestured behind him. "Potter, I introduce to you Mr. Crabbe," his hand moved from Muscles to Balance, "Mr. Goyle. Vincent, Gregory, this is Harry Potter."

Mr. Goyle tilted his head and gave Harry a look that was probably supposed to mean something but ended up just looking squinty. Mr. Crabbe said "Please to meetcha" in a tone that sounded like he was trying to lower his voice as far as it could go.

A fleeting expression of consternation crossed Draco's face, but was quickly replaced by his superior grin.

"You have minions!" Harry repeated. "Where do I get minions?"

Draco's smirk grew wider. "I'm afraid, Potter, that the first step is to be Sorted into Slytherin -"

"What? That's not fair!"

"- and then for your families to have an arrangement from before you were born."

Harry looked at Mr. Crabbe and Mr. Goyle. They both seemed to be trying very hard to loom. That is, they were leaning forwards, hunching over their shoulders, sticking their necks out and staring at him.

"Um... hold on," said Harry. "This was arranged years ago?"

"Exactly, Potter. I'm afraid you're out of luck."

Mr. Goyle produced a toothpick and began cleaning his teeth, still looming.

"And," said Harry, "Lucius insisted that you were not to grow up knowing your bodyguards, and that you were only to meet them on your first day of school."

That wiped the grin from Draco's face. "Yes, Potter, we all know you're brilliant, the whole school knows by now, you can stop showing off -"

"So they've been told their whole lives that they're going to be your minions and they've spent years imagining what minions are supposed to be like -"

Draco winced.

"- and what's worse, they do know each other and they've been practising -"

"The boss told ya to shut it," rumbled Mr. Crabbe. Mr. Goyle bit down on his toothpick, holding it between his teeth, and used one hand to crack the knuckles on the other.

"I told you not to do this in front of Harry Potter!"

The two looked a bit sheepish and Mr. Goyle quickly put the toothpick back in a pocket of his robes.

But the moment Draco turned away from them to face Harry again, they went back to looming.

"I apologise," Draco said stiffly, "for the insult which these imbeciles have offered you."

Harry gave a meaningful look to Mr. Crabbe and Mr. Goyle. "I'd say you're being a little harsh on them, Draco. I think they're acting exactly the way I'd want my minions to act. I mean, if I had any minions."

Draco's jaw dropped.

"Hey, Gregory, you don' think he's tryna lure us away from the boss, do ya?"

"I'm sure Mr. Potter wouldn't be that foolish."

"Oh, I wouldn't dream of it," Harry said smoothly. "It's just something to keep in mind if your current employer seems unappreciative. Besides, it never hurts to have other offers while you're negotiating your working conditions, right?"

"What's he doin' in Ravenclaw?"

"I can't imagine, Mr. Crabbe."

"Both of you shut up," Draco said through gritted teeth. "That's an order." With a visible effort, he transferred his attention to Harry again. "Anyway, what're you doing in the Slytherin Defence class?"

Harry frowned. "Hold on." His hand went into his pouch. "Timetable." He looked over the parchment. "Defence, 2:30pm, and right now it's..." Harry looked at his mechanical watch, which read 11:23. "2:23, unless I've lost track of time. Did I?" If he had, well, Harry knew how to get to whatever lesson he was supposed to be at. God he loved his Time-Turner and someday, when he was old enough, they would get married.

"No, that sounds right," Draco said, looking puzzled. His gaze turned to look over the rest of the auditorium, which was filling with green-trimmed robes and...

"Gryffindorks!" spat Draco. "What're they doing here?"

"Hm," Harry said. "Professor Quirrell did say... I forget his exact words... that he would be ignoring some of the Hogwarts teaching conventions. Maybe he just combined all his classes."

"Huh," said Draco. "You're the first Ravenclaw in here."

"Yup. Got here early."

"What're you doing all the way in the back row, then?"

Harry blinked. "I dunno, seemed like a good place to sit?"

Draco made a scoffing sound. "You couldn't get any further away from the teacher if you tried." The blonde-haired boy leaned slightly closer. "Anyway, is it true about what you said to Derrick and his crew?"

"Who's Derrick?"

"You hit him with a pie?"

"Two pies, actually. What am I supposed to have said to him?"

"That he wasn't doing anything cunning or ambitious and he was a disgrace to Salazar Slytherin." Draco was staring intently at Harry.

"That... sounds about right," Harry said. "I think it was more like, 'is this some kind of incredibly clever plot that will gain you a future advantage or is it really as much of a disgrace to the memory of Salazar Slytherin as it looks like' or something like that. I don't remember the exact words."

"You're confusing everyone, you know," said the blonde-haired boy.

"Huh?" Harry said in honest confusion.

"Warrington said that spending a long time under the Sorting Hat is one of the warning signs of a major Dark Wizard. Everyone was talking about it, wondering if they should start sucking up to you just in case. Then you went and protected a bunch of Hufflepuffs, for Merlin's sake. Then you told Derrick he's a disgrace to Salazar Slytherin's memory! What's anyone supposed to think?"

"That the Sorting Hat decided to put me in the House of 'Slytherin! Just kidding! Ravenclaw!' and I've been acting accordingly."

Mr. Crabbe and Mr. Goyle both giggled, causing Mr. Goyle to quickly clap a hand to his mouth.

"We'd better go get our seats," Draco said. He hesitated, straightened a bit, spoke a bit more fomally. "But I do want to continue our last conversation and I accept your conditions."

Harry nodded. "Would you mind terribly if I waited until Saturday afternoon? I'm in a bit of a contest right now."

"A contest?"

"See if I can read all my textbooks as fast as Hermione Granger did."

"Granger," Draco echoed. His eyes narrowed. "The mudblood who thinks she's Merlin? If you're trying to show her up then all Slytherin wishes you the very best luck, Potter, and I won't bother you 'til Saturday." Draco inclined his head respectfully, and wandered off, tailed by his minions.

Oh, this is going to be so much fun to juggle, I can already tell.

The classroom was filling up rapidly now with all four colors of trim: green, red, yellow, and blue. Draco and his two friends seemed to be in the midst of trying to acquire three contiguous front-row seats - already occupied, of course. Mr. Crabbe and Mr. Goyle were looming vigorously, but it didn't seem to be having much effect.

Harry bent over his Defence textbook and continued reading.

At 2:35PM, when most of the seats were taken and no one else seemed to be coming in, Professor Quirrell gave a sudden jerk in his chair and sat up straight, and his face appeared on all the flat, white rectangular objects that were propped up on the students' desks.

Harry was taken by surprise, both by the sudden appearance of Professor Quirrell's face and by the resemblance to Muggle television. There was something both nostalgic and sad about that, it seemed so much like a piece of home and yet it wasn't really...

"Good afternoon, my young apprentices," said Professor Quirrell. His voice seemed to come from the desk screen and to be speaking directly to Harry. "Welcome to your first lesson in Battle Magic, as the founders of Hogwarts would have put it; or, as it happens to be called in the late twentieth century, Defence Against the Dark Arts."

There was a certain amount of frantic scrabbling as students, taken by surprise, reached for their parchment or notebooks.

"No," Professor Quirrell said. "Don't bother writing down what this subject was once called. No such pointless question will count toward your marks in any of my lessons. That is a promise."

Many students sat straight up at that, looking rather shocked.

Professor Quirrell was smiling thinly. "Those of you who have wasted time by reading your useless first-year Defence textbooks -"

Someone made a choking sound. Harry wondered if it was Hermione.

"- may have gotten the impression that although this subject is called Defence Against the Dark Arts, it is actually about how to defend against Nightmare Butterflies, which cause mildly bad dreams, or Acid Slugs, which can dissolve all the way through a two-inch wooden beam given most of a day."

Professor Quirrell stood up, shoving his chair back from the desk. The screen on Harry's desk followed his every move. Professor Quirrell strode towards the front of the classroom, and bellowed:

"The Hungarian Horntail is taller than a dozen men! It breathes fire so quickly and so accurately that it can melt a Snitch in midflight! One Killing Curse will bring it down!"

There were gasps from the students.

"The Mountain Troll is more dangerous than the Hungarian Horntail! It is strong enough to bite through steel! Its hide is resistant enough to withstand Stunning Hexes and Cutting Charms! Its sense of smell is so acute that it can tell from afar whether its prey is part of a pack, or alone and vulnerable! Most fearsome of all, the troll is unique among magical creatures in continuously maintaining a form of Transfiguration on itself - it is always transforming into its own body. If you somehow succeed in ripping off its arm it will grow another within seconds! Fire and acid will produce scar tissue which can temporarily confuse a troll's regenerative powers - for an hour or two! They are smart enough to use clubs as tools! The mountain troll is the third most perfect killing machine in all Nature! One Killing Curse will bring it down."

The students were looking rather shocked.

Professor Quirrell was smiling rather grimly. "Your sad excuse for a third-year Defence textbook will suggest to you that you expose the mountain troll to sunlight, which will freeze it in place. This, my young apprentices, is the sort of useless knowledge you will never find in my lessons. You do not encounter mountain trolls in open daylight! The idea that you should use sunlight to stop them is the result of foolish textbook authors trying to show off their mastery of minutia at the expense of practicality. Just because there is a ridiculously obscure way of dealing with mountain trolls does not mean you should actually try to use it! The Killing Curse is unblockable, unstoppable, and works every single time on anything with a brain. If, as an adult wizard, you find yourself incapable of using the Killing Curse, then you can simply Apparate away! Likewise if you are facing the second most perfect killing machine, a Dementor. You just Apparate away!"

"Unless, of course," Professor Quirrell said, his voice now lower and harder, "you are under the influence of an anti-Apparition jinx. No, there is exactly one monster which can threaten you once you are fully grown. The single most dangerous monster in all the world, so dangerous that nothing else comes close. The Dark Wizard. That is the only thing that will still be able to threaten you."

Professor Quirrell's lips were set in a thin line. "I will reluctantly teach you enough trivia for a passing mark on the Ministry-mandated portions of your first-year finals. Since your exact mark on these sections will make no difference to your future life, anyone who wants more than a passing mark is welcome to waste their own time studying our pathetic excuse for a textbook. The title of this subject is not Defence Against Minor Pests. You are here to learn how to defend yourselves against the Dark Arts. Which means, let us be very clear on this, defending yourselves against Dark Wizards. People with wands who want to hurt you and who will likely succeed in doing so unless you hurt them first! There is no defence without offence! There is no defence without fighting! This reality is deemed too harsh for eleven-year-olds by the fat, overpaid, Auror-guarded politicians who mandated your curriculum. To the abyss with those fools! You are here for the subject that has been taught at Hogwarts for eight hundred years! Welcome to your first year of Battle Magic!"

Harry started applauding. He couldn't help himself, it was too inspiring.

Once Harry started clapping there was some scattered response from Gryffindor, and more from Slytherin, but most students simply seemed too stunned to react.

Professor Quirrell made a cutting gesture, and the applause died instantly. "Thank you very much," said Professor Quirrell. "Now to practicalities. I have combined all my first-year Battle classes into one, which allows me to offer you twice as much classroom time as Doubles sessions -"

There were gasps of horror.

"- an increased load which I will make up to you by not assigning any homework."

The gasps of horror cut off abruptly.

"Yes, you heard me correctly. I will teach you to fight, not to write twelve inches on fighting due Monday."

Harry desperately wished he'd sat next to Hermione so he could see the look on her face now, but on the other hand he was pretty sure he was imagining it accurately.

Also Harry was in love. It would be a three-way wedding: him, the Time-Turner, and Professor Quirrell.

"For those of you who so choose, I have arranged some after-school activities that I think you will find quite interesting as well as educational. Do you want to show the world your own abilities instead of watching fourteen other people play Quidditch? More than seven people can fight in an army."

Hot damn.

"These and other after-school activities will also earn you Quirrell points. What are Quirrell points, you ask? The House point system does not suit my needs, because it makes House points too rare. I prefer to let my students know how they are doing more frequently than that. And on the rare occasions I offer you a written test, it will mark itself as you go along, and if you get too many related questions wrong, your test will show the names of students who got those questions right, and those students will be able to earn Quirrell points by helping you."

...wow. Why didn't the other professors use a system like that?

"What good are Quirrell points, you wonder? For a start, ten Quirrell points will be worth one House point. But they will earn you other favors as well. Would you like to take your exam at an unusual time? Is there a particular session you would very much prefer to skip? You will find that I can be very flexible on behalf of students who have accumulated enough Quirrell points. Quirrell points will control the generalship of the armies. And for Christmas - just before the Christmas break - I will grant someone a wish. Any school-related feat that lies within my power, my influence, or above all, my ingenuity. Yes, I was in Slytherin and I am offering to formulate a cunning plot on your behalf, if that is what it takes to accomplish your desire. This wish will go to whoever has earned the most Quirrell points within all seven years."

That would be Harry.

"Now leave your books and loose items at your desks - they will be safe, the screens will watch over them for you - and come down onto this platform. It's time to play a game called Who's the Most Dangerous Student in the Classroom."

Harry twisted his wand in his right hand and said "Ma-ha-su!"

There was another high-pitched "bing" from the floating blue sphere that Professor Quirrell had assigned to Harry as his target. That particular sound meant a perfect strike, which Harry had been gotten on nine out of his last ten attempts.

Somewhere Professor Quirrell had dug up a spell that was incredibly easy to pronounce, and had a ridiculously simple wand motion, and had a tendency to hit wherever you were currently looking at. Professor Quirrell had disdainfully proclaimed that real battle magic was far more difficult than this. That the hex was entirely useless in actual combat. That it was a barely ordered burst of magic whose only real content was the aiming, and that it would produce, when it hit, a pain briefly equivalent to being punched hard in the nose. That the sole purpose of this test was to see who was a fast learner, since Professor Quirrell was certain no one would have previously encountered this hex or anything like it.

Harry didn't care about any of that.

"Ma-ha-su!"

A red bolt of energy shot out of his wand and struck the target and the blue sphere once again made the bing which meant the spell had actually worked for him.

Harry was feeling like a real wizard for the first time since he'd come to Hogwarts. He wished the target would dodge like the little spheres that Ben Kenobi had used for training Luke, but for some reason Professor Quirrell had instead lined up all the students and targets in neat orders which made sure they wouldn't fire on each other.

So Harry lowered his wand, skipped to the right, snapped up his wand and twisted and shouted "Ma-ha-su!"

There was a lower-pitched "dong" which meant he'd gotten it almost right.

Harry put his wand into his pocket, skipped back to the left and drew and fired another red bolt of energy.

The high-pitched bing which resulted was easily one of the most satisfying sounds he'd heard in his life. Harry wanted to scream in triumph at the top of his lungs. I CAN DO MAGIC! FEAR ME, LAWS OF PHYSICS, I'M COMING TO VIOLATE YOU!

"Ma-ha-su!" Harry's voice was loud, but hardly noticeable over the steady chant of similar cries from around the classroom platform.

"Enough," said Professor Quirrell's amplified voice. (It didn't sound loud. It sounded like normal volume, coming from just behind your left shoulder, no matter where you were standing relative to Professor Quirrell.) "I see that all of you have succeeded at least once now." The target-spheres turned red and began to drift up towards the ceiling.

Professor Quirrell was standing on the raised dais in the center of the platform, leaning slightly on his teacher's desk with one hand.

"I told you," Professor Quirrell said, "that we would play a game called Who's the Most Dangerous Student in the Classroom. There is one student in this classroom who mastered the Sumerian Simple Strike Hex faster than anyone else -"

Oh blah blah blah.

"- and went on to help seven other students. For which she has earned the first seven Quirrell points awarded to your year. Come forth, Hermione Granger. It is time for the next stage of the game."

Hermione Granger began striding forwards, a mixed look of triumph and apprehension on her face. The Ravenclaws looked on proudly, the Slytherins with glares, and Harry with frank annoyance. Harry had done fine this time. He was probably even in the upper half of the class, now that everyone had been faced with an equally unfamiliar spell and Harry had read all the way through Adalbert Waffling's Magical Theory. And yet Hermione was still doing better.

Somewhere in the back of his mind was the fear that Hermione was simply smarter than him.

But for now Harry was going to pin his hopes on the known facts that (a) Hermione had read a lot more than the standard textbooks and (b) Adalbert Waffling was an uninspired sod who'd written Magical Theory to pander to a school board that didn't think much of eleven-year-olds.

Hermione reached the central dais and stepped up.

"Hermione Granger mastered a completely unfamiliar spell in two minutes, almost a full minute faster than the next runner-up." Professor Quirrell turned slowly in place to look at all the students watching them. "Could Miss Granger's intelligence make her the most dangerous student in the classroom? Well? What do you think?"

No one seemed to be thinking anything at the moment. Even Harry wasn't sure what to say.

"Let's find out, shall we?" said Professor Quirrell. He turned back to Hermione, and gestured toward the wider class. "Select any student you like and cast the Simple Strike Hex on them."

Hermione froze where she stood.

"Come now," Professor Quirrell said smoothly. "You have cast this spell perfectly over fifty times. It is not permanently harmful or even all that painful. It hurts as much as a hard punch and lasts only a few seconds." Professor Quirrell's voice grew harder. "This is a direct order from your professor, Miss Granger. Choose a target and fire a Simple Strike Hex."

Hermione's face was screwed up in horror and her wand was trembling in her hand. Harry's own fingers were clenching his own wand hard in sympathy. Even though he could see what Professor Quirrell was trying to do. Even though he could see the point Professor Quirrell was trying to make.

"If you do not raise your wand and fire, Miss Granger, you will lose a Quirrell point."

Harry stared at Hermione, willing her to look in his direction. His right hand was softly tapping his own chest. Pick me, I'm not afraid...

Hermione's wand twitched in her hand; then her face relaxed, and she lowered her wand to her side.

"No," said Hermione Granger.

Her voice was calm, and even though it wasn't loud, everyone heard it in the silence.

"Then I must deduct one point from you," said Professor Quirrell. "This is a test, and you have failed it."

That reached her. Harry could see it. But she kept her shoulders straight.

Professor Quirrell's voice was sympathetic and seemed to fill the whole room. "Knowing things isn't always enough, Miss Granger. If you cannot give and receive violence on the order of stubbing your toe, then you cannot defend yourself and you will not pass Defence. Please rejoin your classmates."

Hermione walked back towards the Ravenclaw cluster. Her face looked peaceful and Harry, for some odd reason, wanted to start clapping. Even though Professor Quirrell had been right.

"So," Professor Quirrell said. "It becomes clear that Hermione Granger is not the most dangerous student in the classroom. Who do you think might actually be the most dangerous person here? - besides me, of course."

Without even thinking, Harry turned to look at the Slytherin contingent.

"Draco, of the Noble and Most Ancient House of Malfoy," said Professor Quirrell. "It seems that many of your fellow pupils are looking in your direction. Come forth, if you would."

Draco did so, walking with a certain pride in his bearing. He stepped onto the dais and looked up at Professor Quirrell with a smile.

"Mr. Malfoy," Professor Quirrell said. "Fire."

Harry would have tried to stop it if there'd been time but in one smooth motion Draco spun on the Ravenclaw contingent and raised his wand and said "Mahasu!" like it was all one syllable and Hermione was saying "Ow!" and that was that.

"Well struck," said Professor Quirrell. "Two Quirrell points to you. But tell me, why did you target Miss Granger?"

There was a pause.

Finally Draco said, "Because she stood out the most."

Professor Quirrell's lips turned up in a thin smile. "And that is the true reason why Draco Malfoy is dangerous. Had he selected any other, that child would more likely resent being singled out, and Mr. Malfoy would more probably make an enemy. And while Mr. Malfoy might have given some other justification for selecting her, that would have served him no purpose save to alienate some of you, while others are already cheering him whether he says anything or not. Which is to say that Mr. Malfoy is dangerous because he knows who to strike and who not to strike, how to make allies and avoid making enemies. Two more Quirrell points to you, Mr. Malfoy. And as you have demonstrated an exemplary virtue of Slytherin, I think that Salazar's House has earned a point as well. You may rejoin your friends."

Draco bowed slightly and walked back to the Slytherin contingent. Some clapping started from the green-trimmed robes, but Professor Quirrell made a cutting gesture and silence fell again.

"It might seem that our game is done," said Professor Quirrell. "And yet there is a single student in this classroom who is more dangerous than the scion of Malfoy."

And now for some reason there seemed to be an awful lot of people looking at...

"Harry Potter. Come forth."

This did not bode well.

Harry reluctantly walked towards where Professor Quirrell stood on his raised dais, still leaning slightly against his teacher's desk.

The nervousness of being put into the spotlight seemed to be sharpening Harry's wits as he approached the dais, and his mind was ruffling through possibilities for what Professor Quirrell might think could demonstrate Harry's dangerousness. Would he be asked to cast a spell? To defeat a Dark Lord?

Demonstrate his supposed immunity to the Killing Curse? Surely Professor Quirrell was too smart for that...

Harry stopped well short of the dais, and Professor Quirrell didn't ask him to come any closer.

"The irony is," said Professor Quirrell, "you all looked at the right person for entirely the wrong reasons. You are thinking," Professor Quirrell's lips twisted, "that Harry Potter has defeated the Dark Lord, and so must be very dangerous. Bah. He was one year old. Whatever quirk of fate killed the Dark Lord likely had little to do with Mr. Potter's abilities as a fighter. But after I heard rumors of one Ravenclaw facing down five older Slytherins, I interviewed several eyewitnesses and came to the conclusion that Harry Potter would be my most dangerous student."

A jolt of adrenaline poured into Harry's system, making him stand up straighter. He didn't know what conclusion Professor Quirrell had come to, but that couldn't be good.

"Ah, Professor Quirrell -" Harry started to say.

Professor Quirrell looked amused. "You're thinking that I've come up with a wrong answer, aren't you, Mr. Potter? You will learn to expect better of me." Professor Quirrell straightened from where he had leaned on the desk. "Mr. Potter, all things have their accustomed uses. Give me ten unaccustomed uses of objects in this room for combat!"

For a moment Harry was rendered speechless by the sheer, raw shock of having been understood.

And then the ideas started to pour out.

"There are desks which are heavy enough to be fatal if dropped from a great height. There are chairs with metal legs that could impale someone if driven hard enough. The air in this classroom would be deadly by its absence, since people die in vacuum, and it can serve as a carrier for poison gases."

Harry had to stop briefly for breath, and into that pause Professor Quirrell said:

"That's three. You need ten. The rest of the class thinks that you've already used up the whole contents of the classroom."

"Ha! The floor can be removed to create a spike pit to fall into, the ceiling can be collapsed on someone, the walls can serve as raw material for Transfiguration into any number of deadly things - knives, say."

"That's six. But surely you're scraping the bottom of the barrel now?"

"I haven't even started! Just look at all the people! Having a Gryffindor attack the enemy is an ordinary use, of course -"

"I will not count that one."

"- but their blood can also be used to drown someone. Ravenclaws are known for their brains, but their internal organs could be sold on the black market for enough money to hire an assassin. Slytherins aren't just useful as assassins, they can also be thrown at sufficient velocity to crush an enemy. And Hufflepuffs, in addition to being hard workers, also contain bones that can be removed, sharpened, and used to stab someone."

By now the rest of the class was staring at Harry in some horror. Even the Slytherins looked shocked.

"That's ten, though I'm being generous in counting the Ravenclaw one. Now, for extra credit, one Quirrell point for each use of objects in this room which you have not yet named." Professor Quirrell favored Harry with a companionable smile. "The rest of your class thinks you are in trouble now, since you've named everything except the targets and you have no idea what may be done with those."

"Bah! I've named all the people, but not my robes, which can be used to suffocate an enemy if wrapped around their head enough times, or Hermione Granger's robes, which can be torn into strips and tied into a rope and used to hang someone, or Draco Malfoy's robes, which can be used to start a fire -"

"Three points," said Professor Quirrell, "no more clothing now."

"My wand can be pushed into an enemy's brain through their eye socket" and someone made a horrified, strangling sound.

"Four points, no more wands."

"My wristwatch could suffocate someone if jammed down their throat -"

"Five points, and enough."

"Hmph," Harry said. "Ten Quirrell points to one House point, right? You should have let me keep going until I'd won the House Cup, I haven't even started yet on the unaccustomed uses of everything I've got in my pockets" or the mokeskin pouch itself and he couldn't talk about the Time-Turner or the invisibility cloak but there had to be something he could say about those red spheres...

"Enough, Mr. Potter. Well, do you all think you understand what makes Mr. Potter the most dangerous student in the classroom?"

There was a low murmur of assent.

"Say it out loud, please. Terry Boot, what makes your dorm-mate dangerous?"

"Ah... um... he's creative?"

"Wrong!" bellowed Professor Quirrell, and his fist came down sharply on his desk with an amplified sound that made everyone jump. "All of Mr. Potter's ideas were worse than useless!"

Harry started in surprise.

"Remove the floor to create a spike trap? Ridiculous! In combat you do not have that sort of preparation time and if you did there would be a hundred better uses! Transfigure material from the walls? Mr. Potter cannot perform Transfiguration! Mr. Potter had exactly one idea which he could use immediately, right now, without extensive preparation or a cooperative enemy or magic he does not know. That idea was to jam his wand through his enemy's eye socket. Which would be more likely to break his wand than kill his opponent! In short, Mr. Potter, I'm afraid that your proposals were uniformly awful."

"What?" Harry said indignantly. "You asked for unusual ideas, not practical ones! I was thinking outside the box! How would you use something in this classroom to kill someone?"

Professor Quirrell's expression was disapproving, but there were smile crinkles around his eyes. "Mr. Potter, I never said you were to kill. There is a time and a place for taking your enemy alive, and inside a Hogwarts classroom is usually one of those places. But to answer your question, hit them on the neck with the edge of a chair."

There was some laughter from the Slytherins, but they were laughing with Harry, not at him.

Everyone else was looking rather horrified.

"But Mr. Potter has now demonstrated why he is the most dangerous student in the classroom. I asked for unaccustomed uses of items in this room for combat. Mr. Potter could have suggested using a desk to block a curse, or using a chair to trip an oncoming enemy, or wrapping cloth around his arm to create an improvised shield. Instead, every single use that Mr. Potter named was offensive rather than defensive, and either fatal or potentially fatal."

What? Wait, that couldn't be true... Harry had a sudden sense of vertigo as he tried to remember what exactly he'd suggested, surely there had to be a counterexample...

"And that," Professor Quirrell said, "is why Mr. Potter's ideas were so strange and useless - because he had to reach far into the impractical in order to meet his standard of killing the enemy. To him, any idea which fell short of that was not worth considering. This reflects a quality that we might call intent to kill. I have it. Harry Potter has it, which is how he could stare down five older Slytherins. Draco Malfoy does not have it, not yet. Mr. Malfoy would hardly shrink from talk of ordinary murder, but even he was shocked - yes you were Mr. Malfoy, I was watching your face - when Mr. Potter described how to use his classmates' bodies as raw material. There are censors inside your mind which make you flinch away from thoughts like that. Mr. Potter thinks purely of killing the enemy, he will grasp at any means to do so, he does not flinch, his censors are off. Even though his youthful genius is so undisciplined and impractical as to be useless, his intent to kill makes Harry Potter the Most Dangerous Student in the Classroom. One final point to him - no, let us make that a point to Ravenclaw - for this indispensable requisite of a true fighting wizard."

Harry's mouth gaped open in speechless shock as he searched frantically for something to say to this. That is so completely not what I am about!

But he could see that the other students were starting to believe it. Harry's mind was flipping through possible denials and not finding anything that could stand up against the authoritative voice of Professor Quirrell. The best Harry had come up with was "I'm not a psychopath, I'm just very creative" and that sounded kind of ominous. He needed to say something unexpected, something that would make people stop and reconsider -

"And now," Professor Quirrell said. "Mr. Potter. Fire."

Nothing happened, of course.

"Ah, well," said Professor Quirrell. He sighed. "I suppose we must all start somewhere. Mr. Potter, select any student you please for a Simple Strike Hex. You will do so before I dismiss your class for the day. If you do not, I will begin deducting House points, and I will keep on deducting them until you do."

Harry carefully raised his wand. He had to do that much, or Professor Quirrell might start deducting House points right away.

Slowly, as though on a roasting platter, Harry turned to face the Slytherins.

And Harry's eyes met Draco's.

Draco Malfoy didn't look the slightest bit afraid. The blonde-haired boy wasn't giving any visible sign of assent such as Harry had given Hermione, but then he could hardly be expected to do so. The other Slytherins would think that rather odd.

"Why the hesitation?" said Professor Quirrell. "Surely there's only one obvious choice."

"Yes," Harry said. "Only one obvious choice."

Harry twisted the wand and said "Ma-ha-su!"

There was complete silence in the classroom.

Harry shook his left arm, trying to get rid of the lingering sting.

There was more silence.

Finally Professor Quirrell sighed. "Yes, quite ingenious, but there was a lesson to be taught and you dodged it. One point from Ravenclaw for showing off your own cleverness at the expense of the actual goal. Class dismissed."

And before anyone else could say anything, Harry sang out:

"Just kidding! RAVENCLAW!"

There was silence for a brief moment after that, a sound of people thinking, and then the murmurs started and rapidly rose to a roar of conversation.

Harry turned towards Professor Quirrell, the two of them needed to talk -

Quirrell had slumped over and was trudging back to his chair.

No. Not acceptable. They really needed to talk. Stuff the zombie act, Professor Quirrell would probably wake up if Harry poked him a couple of times. Harry started forward -

WRONG

DON'T

BAD IDEA

Harry swayed and stopped in his tracks, feeling dizzy.

And then a flock of Ravenclaws descended on him and the discussions began.