Paradigm: A set of assumptions, concepts, values, and practices that constitutes a way of viewing reality for the community that shares them, especially in an intellectual discipline.

The word "paradigm" was originally one of those obscure academic terms that has undergone many changes of meaning over the centuries. The classical Greeks used it to refer to an original archetype or ideal. Later it came to refer to a grammatical term. In the early 1960s Thomas Kuhn (1922-1996) wrote a ground breaking book, The Structure of Scientific Revolutions, in which he showed that science does not progress in an orderly fashion from lesser to greater truth, but rather remains fixated on a particular dogma or explanation - a paradigm - which is only overthrown with great difficulty and a new paradigm established. Thus the Copernican system (the sun at the center of the universe) overthrew the Ptolemaic (the earth at the center) one, and Newtonian physics was replaced by Relativity and Quantum Physics. Science thus consists of periods of conservatism ("Normal" Science) punctuated by periods of "Revolutionary" Science.



I say para-dim