Belief testing: 2nd law of thermodynamics A box, big balls, and two observers; an ordinary demon, and a pity human. There is a box like a typical Maxwell's Demon problem, with a hole in the middle that opens and closes repeatedly, and then closes forever at time t = T. However, before t = 0, another hole was opened on one side of the box, and the ordinary Demon outside the box threw the ball into it. Demon calculates the trajectories of the 2N balls before throwing. The balls are large enough to have deterministic motion. In other words, the trajectory can be accurately calculated in advance. After throwing all the balls, block the hole at t=0. Now the box is a closed system. At t=0, there are N balls on the left and the right sides of the box, and the energy on both sides is the same. However, as a result of the balls moving, there are N balls with low energy on the left and N balls with high energy on the right, at time t=T. Of course, the above distribution is Demon's preference. The Demon is so capable that he can change the situation on the left and right sides, or make all the balls collect in one space. Consider two observers. Demon is outside the box and he knows that he calculated. Another observer, Human, is inside the box and does not know that the trajectories of the balls had been calculated in advance. Human became pitiful. Human believed the second law of thermodynamics was unbreakable, but now the belief is being tested. What's wrong? And what about Demon's view? What would change if the locations of Demon and Human were switched? #MaxwellsDemon #Thermodynamics #ThoughtExperiment #Entropy

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