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