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