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