Prompt submitters with articles using some of the same terms and ask them to be sure its a new topic or a substantially different perspective on an old one. U

Prompt submitters with articles using some of the same terms and ask them to be sure its a new topic or a substantially different perspective on an old one. Use a list of the five likeliest matches. Let sphinx or some other search engine do the work. This won't work in every case, but even 50% would be a significant improvement.