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