“So I guess you could say Neel owes me a few favors, except that so many favors have passed between us now that they are no longer distinguishable as individual acts, just a bright haze of loyalty. Our friendship is a nebula.”

“Neel cuts in: "Where'd you grow up?""Palo Alto," she says. From there to Stanford to Google: for a girl obsessed with the outer limits of human potential, Kat has stayed pretty close to home. Neel nods knowingly. "The suburban mind cannot comprehend the emergent complexity of a New York sidewalk.""I don't know about that," Kat says, narrowing her eyes. "I'm pretty good with complexity.""See, I know what you're thinking," Neel says, shaking his head."You're thinking it's just an agent-based simulation, and everybody out here follows a pretty simple set of rules"-- Kat is nodding--"and if you can figure out those rules, you can model it. You can simulate the street, then the neighborhood, then the whole city. Right?""Exactly. I mean, sure, I don't know what the rules are yet, but I could experiment and figure them out, and then it would be trivial--" "Wrong," Neel says, honking like a game-show buzzer. "You can't do it. Even if you know the rules-- and by the way, there are no rules--but even if there were, you can't model it. You know why?"My best friend and my girlfriend are sparring over simulations. I can only sit back and listen. Kat frowns. "Why?""You don't have enough memory.""Oh, come on--""Nope. You could never hold it all in memory. No computer's big enough. Not even your what's-it-called--""The Big Box.""That's the one. It's not big enough. This box--" Neel stretches out his hands, encompasses the sidewalk, the park, the streets beyond--"is bigger."The snaking crowd surges forward.”

“Neel takes a sharp breath and I know exactly what it means. It means: I have waited my whole life to walk through a secret passage built into a bookshelf.”

“But it will make mistakes," she says. "Hadoop will probably get us from a hundred thousand buildings down to, like, five thousand.""So we're down to five days instead of five years.""Wrong!" Kat says. "Because guess what--we have ten thousand friends. It's called"--she clicks a tab triumphantly and fat yellow letters appear on the screen--"Mechanical Turk. Instead of sending jobs to computers, like Hadoop, it sends jobs to real people. Lots of them. Mostly Estonians."She commands King Hadoop and ten thousand Estonian footmen. She is unstoppable.”

“Kat bought a New York Times but couldn’t figure out how to operate it, so now she’s fiddling with her phone.”

“So I switch to my MacBook and make my rounds: news sites, blogs, tweets. I scroll back to find the conversations that happened without me during the day. When every single piece of media you consume is time-shifted, does that mean it’s actually you that’s time-shifted?”

“...I can’t stop squirming. If fidgets were Wikipedia edits, I would have completely revamped the entry on guilt by now, and translated it into five new languages.”