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