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