1. A method of automatically creating subtext and using subtext to associate textual information regarding text and/or images by sense thereof, said method being carried out by a programmed computer system and comprising the following steps that the computer system need not execute in the stated order: (a) receiving textual information into computer storage and dividing the textual information into passages; (b) extracting predicative phrases from a passage of said textual information; (c) deleting lexical noise from the passage; (d) extracting nouns from the predicative phrases; (e) creating one or more clusters of synonyms for said nouns; (f) creating subtext comprising an enhanced set of predicative phrases for said passage from said nouns and said one or more clusters of synonyms; (g) subjecting each of a sequence of other passages of the received textual information to steps (b) through (f) to thereby create respective subtext for the respective passages; (h) testing respective subtexts for compatibility in accordance with a selected compatibility relationship; and (i) associating passages with each other based on results of said testing for compatibility of their respective subtexts.