18. The system of claim 15 , wherein at least one of the plurality of queries is configured to score a reference document based on the reference document's relevance with respect to the source document and on a number of reference documents identified the at least one query's respective list of documents.
15. A computer system, comprising: a memory that, during operation, stores instructions; and a processor that, during operation, retrieves instructions from the memory and executes at least some of the instructions to cause the computer system to: initiate, based on receipt of a source document, a routine for identification of one or more candidate duplicate documents of the source document from a document corpus, said identification comprising: receive the source document, wherein a document type of the source document is the same as a document type of at least some of a plurality of reference documents in the document corpus; determine a plurality of queries from content of the source document; execute the plurality of queries on the document corpus, wherein the plurality of queries includes: a first query configured to return a first list of reference documents that identifies at least some of the plurality of reference documents of the document corpus, wherein reference documents in the first list are associated with scores representing at least in part relevance with respect to the source document; a second query different from the first query by at least one search term from the first query and configured to return a second list of reference documents that also identifies at least some of the plurality of reference documents of the document corpus, wherein reference documents in the second list are associated with scores representing at least in part relevance with respect to the source document; based, at least in part, on scores for the reference documents for the first and second list, select one or more of the reference documents having a respective score that meets a score threshold as potential duplicates of the same received source document that initiated the routine; and store an identification of the one or more potential duplicate documents.