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