The second law of thermodynamics: the overall entropy, or disorder, of an isolated system which is not in equilibrium will increase over time, approaching a maximum value at equilibrium, or at maximum disorder.
Okay, we all know that, according to the Second Law of Thermodynamics, you cannot unmix liquids after they’ve been mixed, right? Okay, all you smart people, here’s a streaming video for you to watch and to explain, where a mixed solution is unmixed by reversing the stirring process. [2:19].
In the unlikely event that you all get stuck trying to explain how this is done, I’ll post an explanation in exchange for a million dollars!