If entropy were reversed, would time be reversed?

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In summary, the conversation discusses the possibility of reversing the second law of thermodynamics and the motion of matter in the universe, resulting in a return to a previous state after 24 hours. The question of whether time would be flowing backwards or forwards is raised, but the answer depends on one's interpretation of the concept of time flowing backwards. The closure of the thread is attributed to the lack of a definitive answer to the question.
  • #1
TheQuestionGuy14
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If we reversed the second law of thermodynamics, and entropy decreased, and also managed to reverse the motion for all matter in the universe, so that in 24 hours, everything would return to the state it was at then, would time be said to be flowing backwards? Or would time still be flowing forward, just matter is in reverse?
 
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If time were to flow backward, you could not be aware of it. Everything in the entire universe would have to revert to its previous state, including the state of the neurons in your brain.

AM
 
  • #3
TheQuestionGuy14 said:
would time be said to be flowing backwards? Or would time still be flowing forward, just matter is in reverse?
Whatever is said depends on what the speaker thinks the words "time flowing backwards" mean.

That's not a very satisfying answer, but I don't believe that the question as asked has any better answer.
This thread is closed, but as with all such thread closures we can reopen it when and if someone suggests a more rigorous way of formulating the question.
 

1. What is entropy and how does it relate to time?

Entropy is a measure of the disorder or randomness in a system. It is closely related to the concept of time, as it is a fundamental aspect of the arrow of time - the direction in which time flows. Entropy always increases with time, meaning that systems tend to become more disordered over time.

2. Can entropy be reversed?

In theory, yes, entropy can be reversed. However, it would require a highly unlikely scenario where all the molecules in a system spontaneously rearrange themselves to a state of lower entropy. This is known as a "miracle" or "Boltzmann's brain" and is not considered a realistic possibility.

3. If entropy were reversed, would time also be reversed?

No, reversing entropy does not necessarily mean that time would also be reversed. The flow of time is a separate concept from entropy. Even if entropy were to decrease, time would still continue to move forward.

4. What would happen if entropy were reversed?

If entropy were to decrease, it would mean that a system becomes more ordered and less random. This could potentially have significant consequences, such as reversing the effects of aging or unburning a fire. However, as mentioned before, this is not considered a realistic possibility.

5. Is there any evidence that entropy has ever been reversed?

No, there is no evidence that entropy has ever been reversed in the history of the universe. The second law of thermodynamics, which states that entropy always increases, has been observed and tested countless times and has never been found to be violated.

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