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