3. The system of claim 1 , wherein the processor is further configured to: determine concept voting scores, each concept voting score indicating the prevalence of a concept being tagged to individual documents of the list of result documents.
6. The system of claim 3 , wherein the processor is further configured to determine cooccurrence scores, each cooccurrence score comprising a voting score compared with an expected cooccurrence score for the associated concept, the expected cooccurrence score comprising the multiplication product of: a number of result documents divided by a number of documents in a searched index and a number of documents in the searched index having the associated concept tagged thereto divided by the number of documents in the searched index.