1. A method for automatically suggesting known highly-ranked queries in response to a first query, comprising: calculating a revision score for an indexed query as a function of a revision probability for the first query with respect to the indexed query and a query rank for the indexed query; responsive to the revision score, selectively retrieving the indexed query as an alternative query to the first query; and responsive to the alternative query being a known highly-ranked query, returning the alternative query as a candidate revision query.