The bounded observerA sandbox you can play with, and a plain walkthrough of what it shows.The one ideaNo mind sees all of reality. Your eyes take in a sliver of the light in a room, your brain throws most of it away, and what is left is a compressed, useful sketch you act on. Any observer that is part of the world, whether a cell, a brain, a computer, or an AI, faces the same problem: there is far more going on than it can track, so it must compress. This page lets you measure that. It builds...