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