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