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