Model building is sometimes compared to map making. If you wanted to give people directions for reaching the place where you live, what would you put on the map that you drew for them? What would you put on the map you drew if someone asked you about good places to go hiking, where the highest point is, or how close you are to your town boundary? Is it possible for a single, readable map to answer every possible question? Does your goal for the map affect what you put on it?