Seeing that Hawking's breathing improved, Elaine asked and answered Huang Ji, and stood silently and did not dare to interrupt, or even dared to breathe.

She doesn't know what to change history or create history.

Elaine only knew that she must be witnessing history.

Hawking thought for a moment, but did not understand the meaning of Huangji. History cannot be changed, so he can only create it? He did not want to hear such a vague answer.

He asked, "Are you really a time traveler? I still can't believe it. When I saw that invitation, I felt that the world I understood throughout my life was collapsing."

Huang Ji didn't say anything and didn't say anything.

Hawking said: "I won't send an invitation. I can tell you very firmly that I won't send an invitation!"

"Please don't say that you will send the invitation instead of me. You should understand that I'm asking a question that is equivalent to the paradox of grandma. Please tell me why you can come to my party?"

Huang Ji put an orange on another one and laughed: "Professor Hawking, as a scientist, you should understand that paradoxes will not really happen."

"When you think something is a paradox, there must be some kind of misunderstanding here."

Hawking asked, "Please tell me what a misunderstanding is it? Since you are here to attend my party, you will definitely be willing to satisfy my curiosity, right?"

Huang Ji said: "Of course, professor, I will also gain something from you."

"Okay." Hawking agreed without hesitation.

He didn't care what Huang Ji needed, even life didn't matter. He had long been sentenced to death by the doctor, and it was his curiosity about the universe that drove him to live to this day.

Huang Ji said: "If A went back to the past and killed his grandmother before his mother was born, people naturally believed that this action would cause conflicts, resulting in A not being born and not going through time and space to kill his grandmother."

"This is the grandmother paradox proposed by Hine. It is widely circulated and very classic. It also represents a certain arrogance of human beings towards time."

"In the story of the grandmother paradox, it is forcibly set that 'a is a person born normally without being killed'. At the beginning of logic, it implants the history of the grandmother living. This premise is obviously assumed."

"After first arranging a 'normal history', it is assumed that a time and space travel through time and killing grandmother, creating a b-history."

"Then this story, afterwards, putting a history and b history together, compared it as an event that is 'constant', and it is said that it is contradictory. Isn't this nonsense?"

"Alexander's conquest of Egypt was a kind of history. He did not conquer Egypt, and it was also a possibility of history. Two historical possibilities, as long as they proceed at the same time, are naturally contradictory."

"The whole paradox, which is clearly a person who has participated in two kinds of history, has misled people to think that 'it should happen at the same time' is a change of concepts."

"This is a typical logical misunderstanding, a artificially created paradox."

Hawking said with his neck tilted, "This is a thought experiment. Of course, there is a presumption. This person travels through the past and participates in the past history, and of course it belongs to two kinds of history at the same time."

Huang Ji said: "This is a misunderstanding. Professor Hawking."

"The reason why we change the concept without feeling inconsistent is because there is a setting of 'time travel' in the middle."

"People actually know nothing about going back to the past, so you instinctively feel that it is reasonable to participate in both history at the same time."

Seeing that Hawking had not figured it out by himself, Huang Ji laughed and said, "A phenomenon must make sense when it happens. When people think that something is a paradox, it must be that something inside has been misunderstood."

Hawking agrees with this very much, which is the cornerstone of science.

One thing is a paradox, either a certain concept has not been added, or a certain concept inside is wrong.

Therefore, there are two main explanations for the grandmother's paradox. One is Hawking's time-series protection conjecture: time travel is not allowed at all.

The second type is the famous parallel world theory. When a person travels through time, he arrives in a brand new world. He is not his grandmother, but his grandmother who is exactly the same "other self".

"So...you mean parallel world? You are already standing in front of me, and there is no paradox, so you are from another parallel universe? Am I wrong..." Hawking said.

He does not support parallel worlds. He believes that time travel does not exist in order to prevent the paradox from happening.

Now Huang Ji is standing in front of him, and he can only think that Huang Ji comes from a parallel world.

Unexpectedly, Huang Ji shook his head and said, "No, you are the right one. Your theory is closer to the truth, Professor Hawking. Time travel will not split into parallel worlds."

Hawking's eyes moved suddenly, and he was greatly surprised.

What? Not the parallel world theory? Time sequence protection is closer to the truth?

How is it possible? In other words, what time travelers travel through is the past of their own world? Isn’t this still facing the paradox of grandmother?

Huang Ji explained: "The misunderstanding of the grandmother's paradox is that time travelers can enter the past history... and then return to the original history."

"This is people's biggest misunderstanding: treat time as space."

"People cannot perceive time, just like they cannot perceive a higher dimension, so they can only compare and guess what it looks like."

"Because people can move forward and backward in space, we take it for granted that once we master the time, we should also move forward and backward in time."

"This leads to everyone understanding time as a road, understanding time travel as being able to return to the starting point after going back to the past."

"In the end, I was depressedly comparing the contradiction between 'the world before I changed' and 'the world after I changed'. Isn't this nonsense?"

Hawking said: "You mean, after you go back in the past, you can't go back?"

"What about the original world?"

Huang Ji laughed and said, "Look, you are imagining the original world again."

"The reason people feel paradox is because they force themselves to join a 'non-existent' world."

"Time is misunderstood. It should not be compared with space, but with 'light'."

"The light... is reflected back, do you think the light is flowing backwards? It just changed directions."

Hawking was silent and then asked, "So what is the essence of time?"

Huang Ji said: "You can imagine the nature of time as a matter."

"It is not that all things move forward in time, but that time is born one by one on everything. Time is not space, it is not a road."

"Time also has particle properties, part by part, like a quantum of light, absorbed by all things. This absorption itself does not consume time, but is actually the intrinsic property of matter."

"It appears instantly like quantum fluctuations and falls, and is consumed instantly."

"All things include space. When they absorb time, they can change themselves, and they can only absorb, not emit. Just like entropy increases, it has only one direction. The 'time entropy' consumed will only increase, not decrease."

"If matter does not absorb time again, it will be still. It is a bit similar to energy, right? Time is a kind of 'fuel', but it is the 'energy that drives things to change'."

"Energy is just a condition that drives the change of matter. Light has energy, but without time, everything will not change, space will not expand, energy will also stop, and a world that will not change is meaningless."

"The more time all things absorb, the faster they change. On the contrary, the slower they change. This is related to mass. Where the space distortion is greater, the lower the rate of absorption time. The most efficient one is undoubtedly the rate of time absorbed by zero-mass objects in a vacuum."

Elaine was confused when she listened on the side, and her little face was confused.

But Hawking was stunned. Huang Ji directly treated time as matter, energy, and space as matter, and finally unified them together, and proposed the concept of time entropy, which was consistent with reality while preserving the second law of thermodynamics.

Relativity and quantum mechanics are two edifices of human physics, but they are incompatible with each other. The biggest contradiction is the understanding of time and space.

People have been seeking theories to unify them, and then things like string theory emerged, and they had to add high-dimensional conjectures.

But Huang Ji took a different approach. It directly treated time as a matter like quantum fluctuations and fluctuations, and was born one by one. It had no mass or was not subjected to force, so it was unobservable.

The only thing that proves that it exists is the slow time of large-mass objects.

Huang Ji is compatible with relativity and quantum mechanics.

"This is amazing, can you prove it? Can you deduce it with mathematical description?" Hawking said eagerly.

However, Huang Ji said calmly: "Sorry, Professor Hawking, the proof of the process is too big and I can't write it here!"

"#@￥#@#@…￥#@!" Hawking had a language barrier again and couldn't say a word in a long time.

He knew that this was not just a matter of being unable to write down, and his limited life would probably be difficult to read the unified model of the universe.

"So the essence of time travel is not to cross the past on the timeline, but to... discharge time?" Hawking slowly calmed down and immediately deduced the time reflux method based on Huang Ji's theory.

Huang Ji said: "Yes, this is a theoretical method of time regression. Just as life is a low-entropy body that can discharge entropy in the body, this is actually aggravation of the entropy increase of the entire universe."

"The same is true for emission time. Normally, it cannot be emitted, but in theory, technology can be used to achieve 'time emission'. One emission will inevitably lead to the other to bear it. Emission time itself will also consume time, and the total amount of time in the universe is limited, so it will eventually lead to... 'time silence' and the time entropy increases to the limit."

Hawking said in surprise: "Is time... limited?"

Huang Ji said: "The biggest misunderstanding about time lies in this. The total amount of time is limited. This is cruel, but the fact is."

"The total amount of matter in the universe is finite, energy is finite, and space is finite. Why is time infinite?"

"Physicists are committed to unifying time, space, energy, and matter, and they all regard them as 'same thing', and they are essentially the same thing."

Hawking was silent. If he wanted to establish a unified theory, then these four things were actually different manifestations of the same thing.

Huang Ji continued: "Absorption and emissions are both consuming time, and emissions consume double the amount. So Dr. Hawking, your theoretical idea is correct, 'time is irreversible', but the universe can return to its past state, which is not actually contradictory."

"If an object stops absorbing time, then it will stop time, and no matter how it attacks it, it will not cause any physical reaction or chemical changes with it. No, you can't even see it! Because it does not shine and does not participate in electromagnetic interactions."

"In the universe, it does not even know that it exists except for fixing the originally twisted space-time, that is, the gravitational field."

"If it accelerates absorption, then it accelerates time. Cover the entire earth in the time acceleration field, and you will see the rapidly developing earth..."

"On the contrary, if a person wants to rejuvenate and rejuvenate his own time, everything will be backwards in the position of the material and state."

"If you want to go back to the past, you can discharge the entire space and all the material inside."

Hawking understood that in this way, the paradox of grandmother is no longer contradictory.

Assuming a emitted all matter in the universe for the time, such as fifty years, then he would go back fifty years ago.

He killed his grandmother, but this did not lead to his disappearance, because he had already 'killed' his mother as early as when he was back in time. He erased all the things that had been born in fifty years and brought all the particles back to their past state.

a Return to fifty years ago, belonging to the "isolated island in the long river of time", and it will never go back fifty years later. Time is irreversible, history is history, and what has passed is the past.
To be continued...