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