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knowledge(artificial intelligence, information science)
Knowledge differs from data or information in that new knowledge may be created from existing knowledge using logical inference. If information is data plus meaning then knowledge is information plus processing.
A common form of knowledge, e.g. in a Prolog program, is a collection of facts and rules about some subject.
For example, a knowledge base about a family might contain the facts that John is David's son and Tom is John's son and the rule that the son of someone's son is their grandson. From this knowledge it could infer the new fact that Tom is David's grandson.
See also Knowledge Level.
the result of cognition of reality verified in practice; the true reflection of reality in the consciousness of man.
Knowledge is the opposite of ignorance, the absence of verified information about something. Elementary knowledge resulting from biological regularities is characteristic of animals as well, for whom it serves as a necessary condition for the vital activity of the organism and for the realization of its behavioral activity. Knowledge may be everyday, prescientific, artistic, or scientific; scientific knowledge is subdivided into empirical and theoretical. As a rule, everyday knowledge is limited to the statement and description of facts. Scientific knowledge ascends to the level of explanation of facts and their comprehension in a system of concepts of a given science; it is included within a theory. The essence of scientific knowledge consists in understanding reality in its past, present, and future; in reliably generalizing from facts; in dis-covering necessary and regular laws behind random occurrences and general patterns behind singular events; and on such a basis, in foreseeing phenomena. Human thought is constantly advancing from ignorance to knowledge, from superficial to increasingly more profound and comprehensive knowledge.
A. G. SPIRKIN