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