1. A system for propagating classification decisions, comprising: text marked within one or more unclassified documents that is determined to be responsive to a predetermined issue, wherein the one or more unclassified documents are selected from a corpus of unclassified documents; a query generator to generate a search query from the responsive text and to identify result documents, comprising: a same search module to identify same result documents by applying inclusive search parameters to the query, by applying the search query to the corpus, and by identifying the documents that satisfy the query as the same result documents; and a similar search module to identify similar result documents from the corpus by adjusting a breath of the query by applying less inclusive search parameters and by identifying documents from the corpus that satisfy the query as the similar result documents; a propagator to automatically assigning a responsive classification code to the same result documents for classification as responsive documents; and a document feeder to provide the similar documents to the user and to receive a responsive classification decision from the user for at least one of the similar documents for classification as the responsive documents.