Task: Text Categorization
Input (English): One objection to a formulation of this statement was resolved in part by Evans and Searles's introduction of the fluctuation theorem; that objection invoked time-reversal symmetry and is Loschmidt's paradox. That formulation is Boltzmann's H-theorem, while continuum mechanics uses an inequality named for its most famous formulator and (*) Duhem. A thought experiment concerning this statement involving a creature that would sort particles based on temperature, Maxwell's Demon. Rudolf Clausius described this law by saying that no process can solely transfer heat from a lower to higher temperature body. For 10 points, name this law holding that the entropy of a closed system always increases.
Output (English): Science