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