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