Knowledge is defined in the Oxford English Dictionary (i) the experience and knowledge acquired by a person with experience or training in theoretical or practical understanding of the subject, (ii) what is known in a particular area or all of the factsand information, or (iii) be absolutely certain, or sure of anything. Philosophicaldebates in general start with Plato’s formulation of knowledge as “justified true belief. “However, there is no single definition of knowledge at the time, nobody in sight, and left with several competing theories. Information acquisition involves complex cognitive processes: perception, learning, communication, association and reasoning. term data is also used to refer to understand some of the issues and usability for a specific purpose, if necessary. More information about the discipline of knowledge management.