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