Fennimore Cooper's Literary Offences

1. I don't think I understand.!.!.!.
2. I learned that Cooper doesn't follow the 19 rules governing literary art in the domain of romantic fiction and that he is unrealistic. He also uses to many details on unimportant subjects.
3. It kind of confused me but I slightly think that maybe Mark Twain is putting his emotion and feeling into the characters of Huck Finn to reflect on how he feels about other writings. I also learned that Mark Twain is a hypocrite because he said himself that he is guilty of breaking some of the rules also.