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