economy. Christopher Coutinho Isn't that a big problem? A model should include as much information as possible, right? George Well, let's think our way through that. One example of a model in everyday life is a road map telling you how to get from one place to another. Let's say I want to show you how to get from your house to my house as efficiently as possible. Should I maximize detail on the map or try to keep it only to the most important points, like where to turn or an important landmark? A good road map would keep only the most important points and leave out unnecessary detail, Maximum detail would be most helpful. I want to know about every blade of grass!