A map is an orientation device. It’s a tool that helps the mind orient to a territory. It can be an approximation of territory in physical space, as with a traditional map, or it can be an approximation of territory in conceptual space, as with a mental model. …

If you need to pee when you’re out in public, where do you go? Your answer will depend on what city you’re in and at what time. If it's the middle of the day in Tokyo, you might find a clean, architectural masterpiece to relieve yourself in. …