15. The system as set forth in claim 13 wherein the program instructions for displaying of the drill-down dialog comprises program instructions for accessing one or more recorded links between the first and the second or more documents and creating a graphical user display according to the links.
13. A system for a user to curate a corpus of a cognitive computing system comprising: a computing system having a processor; a computer-readable memory device which is not a propagating signal per se; and program instructions embodied by the computer-readable memory device which, when executed, cause the processor to perform steps of: producing a parse tree illustration of one or more discrepancies and confidence factors detected between at least a portion of a first document and a second or more documents in a cognitive computing system corpus, wherein the portion and the second or more documents comprise natural language unstructured data, wherein the parse tree illustration comprises a structure of a cluster of documents encapsulating categorized previously-asked questions about the corpus, and wherein the confidence factors are previously-assigned by a cognitive computing system corresponding to the questions and the documents; reporting on a user interface device to a user the parse tree illustration; responsive to receipt of a user selection of an illustrated discrepancy in the parse tree, displaying by a computing system on a user interface device to a user a drill-down dialog which shows at least a text string for the portion of the first document and at least one conflicting text string from the second or more documents, and which provides at least one user-selectable administrative action option for handling the detected discrepancy; and responsive to receipt of a user selection of at least one of the administrative action options, performing by the computing system the administrative action, thereby handling the detected discrepancy to curate the corpus.