16. The system of claim 13 wherein the processor is programmed to: output a representation of corresponding similarity scores for display to the user with the identity of the subset of documents.
16. The system of claim 13 wherein the processor is programmed to: output a representation of corresponding similarity scores for display to the user with the identity of the subset of documents. 17. The system of claim 16 , wherein the representation comprises a graphical representation of corresponding similarity scores.