1. A computer-based knowledge system designed for providing problem and situation assessments in a defined field of knowledge comprising an input/output communication interface zone, an output-assessment-striving knowledge engine, and intermediary structure operatively interposed said zone and said engine, including at least one active, assessment-accessible database which is effectively commonly shared by said zone and said engine, and which contains plural data components, at least some of which, in relation to the assessment exploration of a defined problem and/or situation, have different, effective, operative relational appearances, respectively, which are presented to said zone and to said engine.