The source of the macroscopic time asymmetry, aka the second law of thermodynamics, is the difference of prediction and retrodiction.
In a prediction, the deduction direction is the same as the physical/observer time direction.
In a retrodiction, the deduction direction is opposite to the physical/observer time direction.
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— guess —
If a retrodiction is done by a time-opposite observer, he will see the entropy increasing. For him, he is really doing a prediction.
— guess —
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— Me@2013-10-25 3:33 AM
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The existence of the so-called “the paradox of the arrow of time” is fundamentally due to the fact that some people insist that physics is about an observer-independent objective truth of reality.
However, it is not the case. Physics is not about “objective” reality. Instead, physics is always about what an observer would observe.
— Lubos Motl
— paraphrased
— Me@2019-01-19 10:25:15 PM
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