Life in the collapsed world from scratch

It's like a saying that I often hear, "If something looks like a duck, quacks like a duck, and walks like a duck, then it is a duck."

From a rational point of view, if this can really be done, and no matter what method is used, it is impossible to find the slightest difference between her and the person in memory, then logically, it can indeed be said that they are the same person.

But... From an emotional point of view, this kind of thing is impossible.

"Because the essence of human beings is not an abstraction of a single individual, in its real sense, human beings are actually the sum of all social relations." Cheng Xi continued.

"People are emotionally doomed, and they can't completely connect a created 'duplicate' with the one who died in the past."

"Of course, if you can't fully inherit the existence of past social relationships, it is naturally impossible to become the person you remember."

From this point of view, resurrection in the absolute sense also seems impossible.

However, Cecilia, who heard this, quickly thought of another thing:

If the essence of man is actually the sum total of all social relations...then that is to say...

"Yes, from this point of view, the so-called 'cloning paradox' is actually easy to solve." Cheng Xi saw what was going on in her mind and continued to explain:

"Between two people who can't tell the difference, it doesn't matter who is the original person and who is the cloned person. What matters is who other people think is the original 'body' .”

"If everyone thinks that the clone is the main body, then although you are indeed the main body from an absolute logic point of view, this matter is meaningless to you and is no longer important. She inherited your body. All social relations, then to the world, she is you, the real Cecilia."

"Similarly, if I don't tell you anything, but directly create the individual I'm talking about, and then use various methods to make it inherit all the social relations of 'her' in the past—including your social identity, then for you , for this world, is 'she' equivalent to being resurrected in this world?"

"This kind of thing..."

Cecilia wants to say that she absolutely cannot (bdff) agree with it, but... if it is really like what Cheng Xi said, if he really has the means to do that kind of thing, it is hard for her to say that she will not regard that individual as as my real daughter.

No... definitely.Because this is not actually a conclusion, but the premise of a hypothesis.

Cecilia was suddenly a little scared. She knew that this fear was unfounded and unreasonable, but she just felt scared.

In fact, if this kind of thing really happened, then she should feel happy, because in her eyes at that time, she would think that the person in her memory was indeed resurrected.

But that's why it's scary.

Is the essence of a person so fragile?

It turns out that all of one person can be given to another so easily?

Thinking of this, Cecilia suddenly felt that everything in the past began to become strange.

"But... it is precisely because of this reason that the real resurrection cannot be done."

Cheng Xi stood up, stretched, looked at Cecilia and continued: "There is a saying - you can fool all the people some of the time, and some people forever, but you can't fool all the people forever The situation I just mentioned is only based on an absolutely ideal assumption, and it is actually impossible to achieve."

"The person who appears later cannot fully inherit all the social relations of the person who died. Whether she is a clone, a different-space homotopy or something else, for other people, she will not be the so-called real one. It turns out the 'she'."

"Unless..." Cheng Xi paused for a moment, then smiled and said: "As I said just now, death is the result of entropy increase and is inevitable in the process of life, so as long as the process is reversed and the original time is found That person on the line is equivalent to resurrecting her completely, right?"

Because it appeared from the timeline in the memory, it is irrefutable that she will naturally be the person in the memory.

But... didn't you say that the increase in entropy is irreversible?

"That's what it says... But, you have to know that the law of entropy increase is not deduced by people, but summed up."

"From this point of view... we can't completely deny that there will be exceptions." Cheng Xi said with a smile.

Chapter 360 The Possibility of Anti-Entropy

As long as a law is not proved by a formula, but only stays in the result of statistics, it is difficult to say with certainty that there will be no exceptions.

For example, the famous Goldbach's conjecture, expressed in the language of modern mathematics, is: any formal number greater than 5 can be written as the sum of three prime numbers.

It is easy to see that since there are infinitely many integers in mathematics, no matter how powerful a computer is to verify how many integers people use to prove this conjecture, as long as it cannot be proved thoroughly in mathematical formulas, it cannot be logically proved. The above completely denies the possibility that there will be counterexamples among the infinite number of integers behind.

The same goes for entropy increase.

"Take the most popular Big Bang model today." Cheng Xi gave an example: "According to the principle of entropy increase, the overall entropy value of the universe in the past must have been lower than the current overall entropy value, so going all the way back, It is easy to draw a conclusion—at the beginning of the big bang, the entropy of the universe should be at a historically low value. "

"But the fact is that the primordial fireball at the beginning of the Big Bang was in a state of thermal equilibrium with extremely high entropy."

"It's incredible, isn't it?" Cheng Xi looked at Cecilia and asked.

Cecilia was also stunned. Although she also knew the law of entropy increase, she had never thought about it in this direction before.

So, according to this statement, is the Big Bang model violating the law of entropy increase, or is the law of entropy increase not applicable to the early state of the universe?

Cheng Xi continued: "Of course, scientists will definitely not leave such a big loophole alone."

Otherwise, the correctness of the big bang model cannot be established.

"Then, the explanation they gave is that the primordial fireball was actually in thermal equilibrium at the beginning, but the universe at that time was very small, and what the fireball represented was the state of maximum entropy that the tiny universe could allow, and the scale of today's universe is insignificant compared to the maximum entropy allowed below."

"As the universe expands, the allowable maximum entropy increases, but the actual entropy of the universe falls far behind the allowable maximum value, and the actual entropy is always trying to "catch up" with the allowable maximum entropy, so the thermodynamic first Second Law."

It's like filling a closed space with gas, and when the internal gas molecule movement state is in an equilibrium state, suddenly adding a part of the internal space volume out of thin air, the original equilibrium state in the closed system will be broken, causing the entropy value to increase again. same as moving in the direction of increase.

It seems very reasonable, and the logic is very self-consistent, but there is a problem here-that is, this argument is only applicable to the "open universe" with negative curvature of the universe, and in a "closed universe" model that will eventually collapse , but it is not established.

The same constraints that applied to the early stages of an expanding universe and gave us low entropy should also apply to the final stages of a contracting universe.

It is obviously illogical that the entropy limit at the beginning of time gives us the second law of thermodynamics, but it does not hold at the end of time.

Although it is also possible to quibble with "observations show that our current universe is an 'open universe' with negative curvature", this statement is basically equivalent to denying the possibility of the existence of a "closed universe" state.

The closed universe that is allowed to exist in terms of physical rules is denied in order to cater to the existence of the second law of thermodynamics. Is this a bit of an upside-down?

"So the scientists actually came up with another explanation."

Cheng Xi opened a spatial rift, took a glass of water from somewhere, and continued:

"That is our current universe, which actually originated from an accidental fluctuation of a wider universe."

"Since the second law of thermodynamics is only a statistical behavior, there should always be, in theory, some probability that the entropy of an independent system will spontaneously decrease, and the theory of quantifying this probability is called fluctuation theorem."

"For example..."

Seeing that Cecilia seemed to be in a fog, Cheng Xi raised the water glass in his hand to her and said:

"For example, the water molecules in this glass of water are always moving irregularly and randomly—we all know that there are actually large gaps between the molecules, allowing the molecules to move freely."

· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·?

"And since it's a random movement, you can't deny that there will be a moment in the future when the water molecules in this glass of water happen to move downward at the same time, so that the 'horizontal plane' as a whole moves downward for a certain distance."

Cheng Xi snapped his fingers lightly, and with the flash of thunder, one could clearly see with the naked eye that part of the water in the cup disappeared... No, it was not "disappeared", but "compressed".

"Of course, this is just the result of my demonstration using external force. In fact, the probability of this kind of thing happening is very low, so low that it is almost negligible. But... that's just almost."

...... 0

Statistically speaking, in infinite time, the probability of any event with a non-zero probability will always tend to one, and entropy is just another way of saying probability.

"In this way, we can assume that the universe is actually in a state of thermal equilibrium with extremely high entropy, but due to random fluctuations everywhere, at a certain moment, in a certain part of the universe, the entropy fluctuates randomly to a lower state , and is rapidly returning to the highest entropy 'normal' - which is our current universe."

Cecilia roughly understood that, according to Cheng Xi, a certain degree of entropy reduction is indeed possible.

But... how to do it?If it's purely random probability, isn't it just luck?

"It's not pure probability." Cheng Xi said with a smile: "Have you forgotten, I just demonstrated to you... how to interfere with so-called randomness."

"..." Cecilia froze for a moment, then looked at the water glass in his hand.

"You mean..."

"That's right." Cheng Xi nodded and said, "Let's talk about the conclusion directly—to some extent, time travel is possible by relying on external forces."

All that is needed is a little "breaking" of the rules of physics.

……

PS: By the way, does anyone want to watch the plot of pre-civilization?I wouldn't write Death if no one wanted to read it.

Chapter 360 Three Ways to Reverse Time and Space

From the perspective of relativity alone, time travel is originally allowed, but many restrictions are added.

The biggest limitation is that time travelers cannot interfere with the "self", but can only go to the "future" of "others".

This is actually easy to understand. The relativity of the theory of relativity is the relative reference system between oneself and others. If it can interfere with oneself, it is not called the theory of relativity.

A further explanation is - as we have known before, the sum of the squares of the three-dimensional velocity of an object and the time velocity is the square of the velocity of a person in four-dimensional space-time, that is, "[-]" is the square of the speed of light, which is a fixed value.

Therefore, people can change their own time speed by changing their own speed in the three-dimensional space-time, which is the famous "clock slow" effect.

In this process, although the direction of time will not change, don’t forget that the speed of a person in three-dimensional space is a vector with direction.Since the velocity in three-dimensional space is a vector, it is inevitable that the velocity in four-dimensional space-time formed by it is also a vector with direction.

This leads to the fact that once a person traveling close to the speed of light reverses the direction of the speed, the four-dimensional space-time relative to him will also rotate accordingly, thus causing his "present plane" to completely sweep across the time axis of others, so he will step across A period of other people's time, combined with time dilation, successfully achieved the purpose of time travel.

To put it simply-it only needs to go outside for a lap at a speed sufficient to produce obvious relativistic effects and then come back, which is tantamount to coming to someone else's future.

Although the final result shown does not seem to be much different from hibernation technology, but from a physical point of view, this is time travel in the true sense, after all, the time axis has been crossed.

However, due to the limitation of the speed of light in the theory of relativity, this method can only go to the future of others, but cannot go back to the past or the original time point of oneself, so this can only be regarded as a one-way ticket to the future.

But... pay attention to the premise here - the speed of light limit of the theory of relativity.

So, is there any power that can break through this limitation?

Answer——Isn't the power of the Herrscher of the Sky enough?

"Reversal of cause and effect, reversal of time and space... I just need to find or create such a phenomenon, and I can use the power of the Herrscher of Space to try to travel in time, so as to achieve a real change in the past." Cheng Xi made Final summary.

Cecilia was a little excited, but calmed down quickly.

"But...that's impossible, isn't it?"

Just think about it, how could such a phenomenon exist in the world?If cause and effect can really be reversed, and time and space are really allowed to be reversed, shouldn't the possibility of time travel be discovered long ago?

"Who said it's impossible?" Cheng Xi retorted unexpectedly.

"Cecilia, you probably haven't read a work called Steins;Gate?"

……what is that?

Cecilia was a little confused by his sudden change of subject.

"Does that have anything to do with what we're discussing now?"

"Of course there is..." Cheng Xi said as a matter of course: "After all, the characters in that work used the same method to achieve time travel..."

- Man-made black holes.