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