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The question is based on a false premise. What the Second Law of Thermodynamics states is that the entropy of an isolated system is never decreasing. Is the Uni

The question is based on a false premise. What the Second Law of Thermodynamics states is that the entropy of an isolated system is never decreasing. Is the Universe an isolated system (meaning it cannot exchange matter or energy with its environment across its boundary)? We don't know anything about the boundaries of the Universe, or if it has any at all, therefore the 2nd law doesn't apply. QED.

acqq 7y ago
Based on our observations we can see a lot of galaxies as in practice isolated systems, and for each separate galaxy second law still holds. So this attempt for explanation fails to answer the question.
- lostmsu 7y ago
  No galaxies are particle isolated, as all of them emit radiation.