" when people tell you what to do it is usually confusing and does not make sense. For example, people often say “Be quiet,” but they don’t tell you how long to be quiet for. Or you see a sign which says KEEP OFF THE GRASS but it should say KEEP OFF THE GRASS AROUND THIS SIGN or KEEP OFF ALL THE GRASS IN THIS PARK because there is lots of grass you are allowed to walk on. "

― Mark Haddon , The Curious Incident of the Dog in the Night-Time