Erin is strong. Erin is big. Harry is little. Harry is small. Dave is kind. Alan is rough. Alan is poor. If someone is not huge then they are rough. If someone is not dull then they are smart. If someone is kind then they are wealthy. If someone is wealthy and not sad then they are nice. If someone is rough and not huge then they are bad. If someone is little and small then they are sad. If someone is sad and not wealthy then they are poor. All smart people are quiet. 
Alan is not quiet.