> Is it only one direction or does it work the same from the other side? The relationship is (must be) symmetrical. Were this not so, it would violate a princi

> Is it only one direction or does it work the same from the other side? The relationship is (must be) symmetrical. Were this not so, it would violate a principle called "Maxwell's Daemon" (https://en.wikipedia.org/wiki/Maxwell%27s_demon https://en.wikipedia.org/wiki/Maxwell%27s_demon).