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