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