Although it sometimes gives similar results, its not tf-idf. It is simpler so faster for this task. If it has a name I don't know it, its just an idea I had: S

Although it sometimes gives similar results, its not tf-idf. It is simpler so faster for this task. If it has a name I don't know it, its just an idea I had: Sentences with the most uncertainty associated with them with respect to the document should be the most interesting/relevant.