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