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Maxwell's Demon is an imaginary entity designed as part of a thought experiment to show the statistical nature of the second law of thermodynamics. This thought experiment may present a serious challenge to the validity of the second law. On the other hand, physical analysis of the demon may lead to insights concerning the nature of the second law, while leaving it intact. In order to understand the demon properly, one must have some understanding of the law which it was designed to clarify.

Eric H. Neilsen
Mon Jun 16 13:53:44 EDT 1997