Eddington’s Arrow of Time – describing the one-way direction (or asymmetry) of time – says that things in the real world can never be fully reversed. Unlike in the microscopic world, where things tend to behave a little differently, our world is governed by an obvious flow of time.
A drop of ink can instantly spoil an entire glass of water. Reversing the process would take far more energy and resources than it took to cause it, not to mention more time. The obvious solution