A Mathematical Theory of Communication
A Mathematical Theory of Communication
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A department of systematized knowledge as an object of study is a science. Information science is such a department concerned with all aspects of information. The knowledge deals with the operation of general laws under rigorous conditions, the results of which are reproducible. A theory is a set of interrelated constructs, definitions and propositions that present a systematic view of phenomena by specifying relations among variables, with a purpose of explaining and predicting phenomena. Theory enables one to explain and to predict. When theories exist, based on which behavior of phenomena in a particular science can be explained and predicted with accuracy, these theories form foundations for that science. Theories which withstand the tests of internal consistency, i.e., create no contradictions, are subjected to empirical tests, and are accepted by its peers, become law. In physics, Newton's law of motion and Maxwell's laws of electromagnetics set foundations for the science of physics in two of its aspects. Sometimes theories are discovered in one field which are applicable in another field. Such theories can become a base for foundations in both fields. Information and Communication Theory of Shannon is such a theory. [1]