19. The method according to claim 1 further comprising: classifying each document from among said N electronic documents as relevant or irrelevant to an issue; and generating a computer display of at least one user-selected document within said N electronic documents, wherein at least some words in said user-selected document are differentially presented depending on their contribution to said classifying of the document as relevant or irrelevant, wherein said words differentially presented are differentially colored and intensity of color is used to represent strength of said contribution for each word.
57. The method according to claim 19 wherein said displaying a comparison comprises generating at least one graph of at least one quality criterion vs. iteration serial number.