1. A method of presenting search results returned responsive to executing a query, comprising: determining, by employing a query classifier, whether the query is intrinsically diverse or not intrinsically diverse, wherein the query is intrinsically diverse when included in an intrinsically diverse session, wherein the intrinsically diverse session is directed towards a task, and wherein queries included in the intrinsically diverse session are directed towards respective subtasks of the task; receiving the search results retrieved by a search engine responsive to executing the query, wherein related queries correspond to the search results; evaluating an objective function to compute an optimized value in response to the query being determined to be intrinsically diverse, wherein: the objective function is based on relevance of differing search results to the query, the differing search results returned responsive to the related queries; and the objective function is based on redundancy between the related queries; and controlling presentation of the search results on a display screen according to the optimized value when the query is determined to be intrinsically diverse.