Mirror worlds?
what are they? They are software models of some chunk of reality, some piece of the real world going on outside your window. Oceans of information pour endlessly into the model (through a vast maze of software pipes and hoses): so much information that the model can mimic the reality’s every move, moment-by-moment. A Mirror world is some huge institution’s moving, true-to-life mirror image trapped inside a computer—where you can see and grasp it whole. The thick, dense, busy sub-world that encompasses you is also, now, an object in your hands. A brand new equilibrium is born. Suppose you are sitting in a room somewhere in a city, and you catch yourself wondering—what’s going on out there? what’s happening? At this very instant, traffic on every street is moving or blocked, your local government is making brilliant decisions, public money is flowing out at a certain rate, the police are deployed in some pattern, there’s a fire here and there, the schools are staffed and attended in some way or other, oil and cauliflower are selling for whatever in local markets... This list could fill the rest of the book. Suppose you’d like to have some of this information. why? who are you to be so nosy? Let’s say you’re a commuter or an investment house or a school principle or a CEO or journalist or politician or policeman or even a mere, humble, tax-paying citizen. Let’s say you’re just curious. You want to browse, take in the big picture (it’s your city, isn’t it?)—form some impression of how well the whole thing is working. So you build a model. You lay out a detailed map on your living room floor. You add little model buildings and bridges and cars and policemen and so on, and lots of blackboards. On the blackboards you will record information that doesn’t correspond to any physical object—the state of the budget, the weather; thousands or maybe millions of other tidbits. The blackboards are scattered all over. Given the blackboards, you don’t really need the map, the buildings and so on—the city-in-miniature.