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