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