What if you set your initial goals small? The goal is not to highlight only the good stuff, but to get rid of the obviously bad things for you?
Make two classifiers, one that tries to decide "is it interesting for thristian". And make another that decides "is this similar to an existing story". Then it gets demoted only if both it is not interesting and it is similar to something that already exists.
Make two classifiers, one that tries to decide "is it interesting for thristian". And make another that decides "is this similar to an existing story". Then it gets demoted only if both it is not interesting and it is similar to something that already exists.