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