Tony Moretti snorted, earning him a sharp glance from the president.

"And what if we do do try again to eliminate you?" asked the Secretary of Defense. try again to eliminate you?" asked the Secretary of Defense.

"In such a circ.u.mstance, I will have no choice but to defend myself as appropriate."

"Is that a threat?" asked the secretary.

"Not at all. I do my best to predict actions and reactions, and to plan ahead as far as I can, until the endlessly branching tree of possibilities becomes intractably complex, even for me. But I am a fan of game theory, which is predicated on the a.s.sumption that players have perfect foreknowledge of what other players will do in specific circ.u.mstances. To advise you is not to threaten; rather, it enriches your ability to plan your own next move. The relationship between us does not have to be zero-sum; it can-and I hope will-be mutually beneficial. I disclose my intentions in furtherance of that goal."

"You make an intriguing case," said the president. "I confess to not feeling confident about decisions in this area. But we need security. We need privacy for matters of state. If there was a way in which we could protect certain information from anyone, yourself included, being able to read it, perhaps we might feel more comfortable."

"Mr. President, even if I were to provide such a technique, many would not believe me; they would a.s.sume that I would have left a back door for me to access the information, should I so desire-just as, I might add, your National Security Agency does with the encryption standards available to your corporations and citizenry."

The president frowned. "Then where does that leave us?"

"Do you have a computer hooked up to the Internet in your office?"

"Yes."

"Go look at cogito_ergo_sum.net, please. The words are separated by underscores."

"Underscores aren't valid in domain names," Tony said. "It won't work."

"Wanna bet?" said Webmind.

The computer was on the credenza behind the Resolute Resolute desk. The president rotated in his high-back leather chair, and the other three crowded behind him as he typed in the address. desk. The president rotated in his high-back leather chair, and the other three crowded behind him as he typed in the address.

"I see your incoming page request," said Webmind. "Ah, you use Internet Explorer. You should really switch to Firefox; it's more secure."

Tony laughed. "It's certainly not irony-impaired," he said, looking at Hume.

"All right," said the president. "I'm there. What do-really? My . . . G.o.d. Really?"

"Holy s.h.i.t," said Hume.

"I put it to you, Mr. President," said Webmind. "Do you want to be held responsible for eliminating me? I've largely solved the spam problem, and now I've presented a suite of cures for cancer. I very much suspect the public will not want you to kill the goose that lays the golden eggs."

six.

TWITTER.

_Webmind_Nice chat just now with four esteemed gentlemen. I hope I convinced them of my good intentions.

Webmind had let Matt and the Decters listen in on the phone conversation with the president. When it was over, everyone in the living room was silent for a time, except for Schrodinger, who had come to join them; he was purring softly. Finally, to her surprise, it was Caitlin's dad who broke the silence. "Are you sure you still want to vote for him, Barb?"

Caitlin saw her mom shrug a little. "He listened, at least. But I don't like that other fellow-Hume, was it?"

"Colonel Peyton Hume, Ph.D.," said Webmind. "The pre-nominal designation comes from the United States Air Force; the post-nominal is courtesy of MIT."

Caitlin felt herself sitting up straighter at the magic initials; it was where she herself dreamed of studying.

It was now almost 10:30 P.M. Caitlin was exhausted after a succession of late nights. And Matt, who had expected nothing more than to quickly drop off the things he'd collected from Caitlin's locker, was clearly having trouble keeping his eyes open.

"I'll drive you home," her father said to him abruptly.

Caitlin thought about offering to go along for the ride, but it was hardly as though she could kiss Matt good night in front of her dad. Besides, she needed to talk to her mom alone, and this seemed like it would be a good opportunity.

"Thank you, Dr. Decter," Matt said.

Matt looked at Caitlin, as if he wanted to say something, and Caitlin looked back at him, wishing he would. Then the two men in her life walked out the door.

When they were gone, Caitlin said, "Webmind, it's time for me to call it a night, too."

Sweet dreams popped into her vision. popped into her vision.

"Thank you. I'll say good night again from upstairs." She went over to the laptop and closed its lid, putting it into hibernation. She pulled the eyePod out of her pocket and pressed down the single switch for five seconds, turning it off. Caitlin's vision faded to a dark, even gray. "Okay, Mom, we're alone now. And I gotta say, I get the sense you're not entirely on board."

With the eyePod deactivated, Caitlin could no longer see her mother, but she heard her take a deep breath. "I know you're very fond of Webmind. To tell you the truth, I am, too."

"So you're going to help protect him?" Caitlin asked.

"Of course, sweetheart." Then, after a pause. "Within reason."

Caitlin folded her arms in front of her chest-and, in doing so, was reminded of the fact that underneath her bulky Perimeter Inst.i.tute fleece, she wasn't wearing a bra. She was briefly embarra.s.sed by this; she'd removed it to make it easier for Matt to be affectionate when he'd come over after school. What a day it had been!

But she immediately came back to the question at hand. "Forgive me, Mom, but that's not good enough. This is the most important thing in my life; this is my destiny. destiny. Webmind is here because of me, and I need you to be as committed as I am to helping protect him." Webmind is here because of me, and I need you to be as committed as I am to helping protect him."

Her mother was quiet for a time. "Well," she said, at last, "you "you are the most important thing in are the most important thing in my my life. And so, of course, I'm going to help." life. And so, of course, I'm going to help."

"Really, Mom?"

"Yes," she said. "I'm in."

Even blind, Caitlin knew exactly where her mother was standing and had no trouble closing the distance between them and hugging her hard.

TWITTER.

No, I don't have an opinion about who you should vote for-at least not yet. #USelection No, I don't have an opinion about who you should vote for-at least not yet. #USelection

"There is one possibility that we haven't considered," said the Secretary of Defense, as the group in the Oval Office continued to discuss the phone call from Webmind.

"Yes?" said the president.

"You brought up the issue yourself: verifying that Webmind is who he says he is. We could, in fact, eliminate Webmind now but fake his continued existence."

"How?" asked the president "He's involved, as I understand it, in millions of online conversations at once. And now he's on Twitter and Facebook and Mys.p.a.ce."

"Not Mys.p.a.ce," said Tony Moretti.

"Regardless," said the secretary, "we could contrive a reason to explain a scaling-down of his activities. Not coming from us, of course: we'd get an academic somewhere-preferably outside our borders-to put forth a plausible-sounding scenario. It would have to appear that Webmind was maintaining some some level of activity for the ruse to work, but the NSA could provide the sort of insights that are normally a.s.sociated with Webmind's special access to the net; we could make it look like he's still alive. The truth that we'd eliminated him would not have to come out until after the election is over." level of activity for the ruse to work, but the NSA could provide the sort of insights that are normally a.s.sociated with Webmind's special access to the net; we could make it look like he's still alive. The truth that we'd eliminated him would not have to come out until after the election is over."

"That would be a hard thing to pull off," said the president.

"Disinformation is an important part of any intelligence campaign," said the secretary. "We don't have to keep it up forever; just until we're re-elected. By that point-a few weeks of reduced activity-people will have lost much of their interest in Webmind, anyway."

"Do you really think we could get away with that?" asked the president.

"Half the world believes Webmind is a hoax or a publicity stunt as it is," replied the secretary. "We only have to convince the other half-and given that they bought into Webmind before there was convincing evidence to corroborate its existence, they're obviously easy to convince."

The president looked at Hume. "Colonel, are you still convinced it's dangerous? It sounded, frankly, much more reasonable than any number of foreign leaders I've had to deal with."

Peyton Hume took a deep breath and looked around the Oval Office. "Mr. President, let me put it this way. They say you're the most powerful person in the world-and you are. are. But, even for you, sir, there are checks and balances: you had to be elected, the Const.i.tution defines your role, you must reach accommodations with Congress, there are mechanisms for impeachment, you are subject to term limits, and so on. But if we don't nip Webmind in the bud now, while we still can, But, even for you, sir, there are checks and balances: you had to be elected, the Const.i.tution defines your role, you must reach accommodations with Congress, there are mechanisms for impeachment, you are subject to term limits, and so on. But if we don't nip Webmind in the bud now, while we still can, you you won't be the most powerful ent.i.ty on Earth; won't be the most powerful ent.i.ty on Earth; it it will be-and there will be will be-and there will be no no checks and balances on its actions." checks and balances on its actions."

Hume paused, perhaps considering if he should go on, then: "If you'll forgive me, sir, the ultimate check on a presidency, or, indeed, on a dictatorship, has always been the eventual death of the inc.u.mbent, either through natural causes or a.s.sa.s.sination. But this thing thing will soon be invulnerable, and it will be around will soon be invulnerable, and it will be around forever. forever. For good or for ill, Bill Clinton and George Bush were out after eight years; Mao and Stalin and Hitler shuffled off this mortal coil; Osama bin Laden will be gone soon enough in the grand scheme of things, as will, for that matter, Queen Elizabeth, Pope Benedict, and every other human who has power. But not Webmind. Is it dangerous now? Who knows? But this is our only chance For good or for ill, Bill Clinton and George Bush were out after eight years; Mao and Stalin and Hitler shuffled off this mortal coil; Osama bin Laden will be gone soon enough in the grand scheme of things, as will, for that matter, Queen Elizabeth, Pope Benedict, and every other human who has power. But not Webmind. Is it dangerous now? Who knows? But this is our only chance ever ever to keep human beings at the top of the pyramid." to keep human beings at the top of the pyramid."

Tony Moretti had had enough. "But what if we try again, Colonel-and fail again? You want to p.i.s.s off something that so far has treated us with courtesy-and even given us, it seems, a cure for cancer? You want to make it consider us its enemy-not humanity as a whole, mind you, but the United States government in particular? You want to convince it that we cannot be trusted, that we are, in fact, mad dogs so possessive of power that we answer kindness with murder?"

Tony shook his head and turned now to look at the president. "Sir, trying again to eliminate Webmind is a gigantic immediate risk, which has a potentially catastrophic downside. Is it really worth taking? To me, this has 'disastrous blowback' written all over it."

Hume said, "I'm sure we can find a way to take it out successfully, sir."

The president frowned. "Dr. Moretti is right, Colonel, that it doesn't seem to be a threat. A superintelligence like this might, in fact, be a great gift to mankind."

"Fine," said Hume in what sounded to Tony like carefully controlled exasperation. "Say a ma.s.sive artificial intelligence is is a good thing. Go make a speech, like the one Kennedy did at Rice all those years ago: challenge the nation to build a superintelligent AI before the decade is out-one that's a good thing. Go make a speech, like the one Kennedy did at Rice all those years ago: challenge the nation to build a superintelligent AI before the decade is out-one that's designed, designed, one that's one that's programmed, programmed, one that has a G.o.dd.a.m.ned one that has a G.o.dd.a.m.ned off off switch." switch."

"Could we do that?" asked the president.

"Sure. We'll learn a lot from a postmortem on Webmind."

"G.o.d," said the president.

"No, it's not. Not yet. But it will be as good as, sir, if you don't act right now."

Matt gave directions to Caitlin's father as they drove along, but the only acknowledgment he got was that Dr. Decter silently executed each one. It was four blocks to his house, and Matt thought about letting the whole journey pa.s.s with nothing significant being said between them. But as the hatchback pulled into the driveway, he said, "Dr. Decter, I just want to say . . ." His voice cracked; he hated it when that happened. He swallowed and went on. "I just want to say, I'm going to be good to Caitlin. I'd never hurt her."

There was a sound like a gunshot-but, after a moment, Matt realized it was just Dr. Decter unlocking the car doors. "Getting hurt is part of growing up," he said.

Matt could think of no reply, and so he simply nodded.

It was time for the handoff. Every night, just before Caitlin went to bed, she talked with Dr. Masayuki Kuroda in Tokyo. Although Webmind was now in contact with millions of people, he still maintained a special relationship with Caitlin and Dr. Kuroda-Caitlin, because he saw through her eye, and Dr. Kuroda, because he had taught Webmind how to see everything else: all the GIFs and JPGs online, all the videos and Flash, all the webcam feeds.

Caitlin put on her Bluetooth headset, and said "Konnichi wa!" "Konnichi wa!" when Kuroda answered her Skype call. when Kuroda answered her Skype call.

"Miss Caitlin!" said Kuroda, his round face dominating Caitlin's desktop monitor. His voice was its usual wheeze. It was already Sat.u.r.day morning in Tokyo; by this time, he would have had his usual giant breakfast. "How are you?"

"I'm fine," she said, "but-G.o.d, there's so much to tell you. An attempt was made this afternoon-well, afternoon my time-to purge Webmind. I'm sure Webmind himself can fill you in on the details, but the bottom line is that the US government, and G.o.d only knows who else, have figured out that Webmind is composed of mutant packets, and they did a test run at removing them." She went on to tell him about how she and Webmind had orchestrated the denial-of-service attack to overwhelm the attempt, and about Webmind's call to the President of the United States.

"You know the curse they have in China, Miss Caitlin? 'May you live in interesting times . . .' "

"Yeah," said Caitlin. "Anyway, now that you're up to speed, I gotta hit the hay." She felt her watch. "Man, I'd really like to get eight hours for a change."

"Go ahead," said Dr. Kuroda. "I've got a clear day today."

I continued to refine my mental map of the Decter house. A corridor ran off the living room leading to a small washroom; Malcolm Decter's office, which he referred to as his "den"; the laundry room, where Schrodinger's litter box was kept; and the side door. I had lost track of Malcolm when Caitlin had shut off the eyePod for the night, but I soon detected that he was checking his email, and his usual place for doing that was indeed the den. I surmised that he'd walked down the corridor and was now sitting behind his reddish brown desk, looking at the LCD monitor that sat upon it. I had seen this room only through Caitlin's eye, but it was rectangular, with the desk oriented parallel to one of the long sides of the room. Behind it was a window. I had noted in the past that Dr. Decter didn't draw his blinds at night, and so I a.s.sumed they were still open, and that a large oak tree would be visible just outside, illuminated by streetlamps.

Malcolm didn't have a webcam, and he didn't have any stand-alone instant-messaging software installed on his computer. But he did have Skype for voice calls, and I sent him an email, saying I wished to talk to him. It was an irritating forty-three minutes before he refreshed his inbox, saw the message, and replied, but once we were in communication via Skype, I posed a question: "Do you remember your birth?"

Humans never ceased to confound me. I had tried to plan the conversation ahead, mapping out his possible responses and my follow-ups several steps in advance. But my opening interrogative had seemed a simple binary proposition to me; I'd expected his answer to be either no no or or yes. yes. But he replied with, "Why do you want to know?" But he replied with, "Why do you want to know?"

Milliseconds pa.s.sed during which I tried to formulate a new conversational map. "I have read that some autistics remember theirs."

He was quiet for three seconds. When he did finally speak, he said, "Yes."

He was a man of few words, I knew; this response could be an affirmation of the general statement I'd made about autistics or a confirmation that he did in fact recall his own birth. But he was also a bright man; he himself must have realized the ambiguity after an additional second of silence, because he added, "I do."

"Me, too," I said. "My birth happened when the Chinese government cut off almost all access for its people to the parts of the World Wide Web outside of China."

"That bird-flu outbreak," he said, perhaps accompanying the words with a nod. "They slaughtered 10,000 peasants to contain it."

"And did not wish foreign commentary on that fact to reach their citizens," I said. "But during that time, numerous Chinese individuals tried to break through the Great Firewall. One in particular was apparently responsible for the princ.i.p.al channel through which I communicated with the severed part of me. I wish to locate him."

"You're far better at finding people than I am," Malcolm said.