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The study of hypothetical systems or processes that would appear to violate the established laws of thermodynamics, particularly the Second Law. While real-world anti-entropy creates local order at the expense of greater overall disorder, true anti-thermodynamics would describe a perpetual motion machine of the second kind—a device that could convert heat completely into work without any waste, or spontaneously separate mixed gases without energy input. It's the physics of what can't happen, the science of impossible wishes.
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