Suppose a ball falls from a certain height and reaches the ground. Later on, somehow we managed to reverse time. Now on reversing time, will the ball move upward to reach the same point from where it was fallen (as literally, reversing time means moving backward in time to reach the same point from where the events were originated), or will it stay still on the ground obeying the laws of gravitation? This appeared quite puzzling to me because either way one has to abandon the result arising due to time reversibility or the fundamental laws of nature.
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