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