Question: Model building is sometimes compared to map making. If someone asks you how to get to your house, what will you put on the map you draw for them? What if the question asked has to do with the location of the highest point in town, the town's political boundaries, the public transit system, or how your dwelling links up to the local sewer system? Is it possible for a single, readable map to answer every possible question? Does the goal you have in mind for the map affect what you put on it?