From: tkoenig@netcologne.de   
      
   Julio Di Egidio  schrieb:   
      
   > And *reversibility* itself is already present in classical physics,   
   > namely since the Hamiltonian/Lagrangian approaches, where the dynamics   
   > of a system are described in terms of the evolution of a *system state*   
   > in a state space: *that* evolution has to be reversible, indeed lack of   
   > reversibility would simply not be a state space: IOW, given a "law of   
   > motion", there must be one and only one next state, and one and only one   
   > previous state, or the whole state-space based approach becomes simply   
   > meaningless.   
      
   And yet, the Second Law of Thermodynamics holds.   
      
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