Life in the collapsed world from scratch

All the signs showed that the origin of this person in front of him was not as simple as he said.

Stargazer's eyes flickered, as if he was making a decision in his heart.

Facing the girl's scrutinizing eyes, Cheng Xi sighed helplessly in his heart.

He knew that what he did would definitely arouse the girl's suspicion, but there was no way, since he wanted to get the girl's help, he had to give a suitable explanation.

Of course, he can also make up stories and settings for himself as before, but because his painting style is really incompatible with the personality of this era, and the girl is smart enough, no matter how much he talks about it, it may reveal his truth, so he just doesn't talk about it. Is it?

But in this way, the question arises again. If the girl really wants to break the casserole and ask the bottom line, how should she answer it?

From Cheng Xi's point of view, it's not a big deal to answer truthfully, but whether the girl can accept it, or whether she will believe this answer is another question.

".々Tsk, (Li Hao) is really troublesome..." Cheng Xi rubbed his temples with a headache, but from the corner of his eyes, he suddenly caught a glimpse of the car was empty at this time.

"...Where's the coachman?" He looked at the girl and asked.

"I jumped out of the car just now." Guan Xing replied by pointing to the outside of the car with a feather fan.

And when the coachman jumped out of the car, he screamed, as if he had twisted his foot, but the boy who was still bowing his head in thought at that time probably didn't hear it.

Cheng Xi glanced at the empty front of the car, then at the galloping horses, and asked the girl with a hint of luck, "Can you drive?"

Stargazing returned the look of a fool: "What do you think?"

Cheng Xi: "...heh.".

Chapter 69 You haven't already made a wish, have you?

"Qiankan Gen Zhengxun...Kan lives in the north, and Lichu south..."

Under the night sky, the girl murmured words of unknown meaning, a small and mysterious formation gradually formed on the grass with the movements of her hands, flickered twice and then receded.

Cheng Xi is a little curious, why do you have to recite these mantras when drawing the formation, is it purely for strengthening memory or is there really some metaphysical blessing in it?

"That's it." Guanxing exhaled lightly, turned his head to look at this side: "How are you doing?"

"My side too...uh..." Cheng Xi glanced at the roasted rabbit standing beside the fire, and said in a somewhat uncertain tone, "Is it finished?"

"Really?" Guan Xing was a little skeptical, she didn't want to end up with diarrhea because of eating half-baked barbecue.

The girl came up and fiddled with the roasted rabbit a few times, frowned and complained: "What, this place is not baked at all, how about some snacks."

Looking at the girl skillfully flipping the roasted rabbit, Cheng Xi felt a little strange. Did she often do this kind of thing before?

As for where this rabbit came from... There may not be many others in this kind of inaccessible woods, but rabbits like this can be seen everywhere.

At first, it was cute to see the big eyes blinking when holding this rabbit. Cheng Xi planned to eat half of it and release the rest, but then he considered that half a rabbit might not be enough for two people to eat, so he finally decided to eat half of it. Only baked.

Smelling the alluring fragrance in the air, he couldn't help but sigh that his original decision was so correct.

As for the horse, it was released on the way.After all, neither of them can ride, so it's useless to stay... The main reason is that Cheng Xi has never eaten horse meat, and I heard it's not very tasty.

As the roasting continued, the fat gradually seeped from the surface of the roasted rabbit and dripped into the fire, making a "crackling" (bdff) sound. The girl's focused side face flickered under the light of the fire, casting a shadow on her. A layer of somewhat unreal colors.

Looking at the scene in front of him, and listening to the slight chirping of insects in the woods at night, Cheng Xi only felt that his impatience these days had gradually calmed down...

"—!"

The movements of Guan Xing's hands suddenly froze, an unprecedented strong sense of crisis surged into her heart at this moment, but it was fleeting, and disappeared without a trace before she could react, making her doubt herself Is there an illusion.

"Well……"

The faint sound attracted the stargazer's attention. She turned her head, and what she saw was Cheng Xi covering her eyes with one hand, and her body shaking violently twice.

"Are you... all right?" the girl asked hesitantly.

She didn't know if it was an illusion, but she saw that there seemed to be a faint golden light flashing on the back of Cheng Xi's hand, which was not very real under the light of the fire.

What made her even more concerned were the purple-black lines on the boy's arms that looked very ominous. Although they disappeared quickly, they were still captured by her sight.

"Huh..." Cheng Xi breathed a sigh of relief, smiled at the girl and comforted her, "It's okay, it's just a few minor problems, it'll be fine if you get used to it."

This doesn't look like a minor problem at all, does it?Stargazing thought to himself.

"What are you?" Out of concern, the girl asked.

"Unacceptable." Cheng Xi replied seriously.

Stargazer: "..."

Just talk.

She ignored the boy, and turned her attention back to the roasted rabbit in front of her... In just a short period of time, some places were already slightly burnt.

Cheng Xi breathed a sigh of relief, and wiped the sweat from his forehead, the blow just now really gave him a hard time.Although the core has fallen into silence after the previous berserk, the occasionally leaked Houkai energy is still not something he can bear. Without the protection of the stigmata, his fate will not be worse than the death of the implanted body in the original comics. How much better is Lynn from Tranquil Gem.

"Hey, let me tell you." After a long silence, Guan Xing suddenly asked, "What is the purpose of going to the altar under the sea?"

Cheng Xi froze for a moment. To his surprise, the girl didn't ask him about his origin, but directly asked about his purpose.

"Could it be because of something in there?" Guan Xing narrowed his eyes suspiciously.

"You know?" Cheng Xi was a little surprised.

This is wrong, how would she know.

"Sure enough..." Guan Xing nodded clearly, he really came for the stone statue.

"If that's the case, I advise you to give up." The girl withdrew her gaze, with a hint of inexplicable meaning in her words: "It... won't come out again."

After experiencing repeated failures in reincarnation, the girl naturally remembered the magical stone statue that had fulfilled her wish.But when she went through all kinds of hardships and overcame difficulties to come to the stone statue again, she found that the other person seemed to have lost her power, and she couldn't be awakened no matter what.

"I won't come out again..." Cheng Xi frowned, he cared more about the meaning behind the sentence than the sentence itself.

"Stargazing, you..." He looked seriously at the girl's blue eyes, paused for a moment and continued to ask:

"Could it be... that you have already made a wish?"

Chapter 70 Time to be Negated

The air seemed to stagnate at this moment, and the two fell silent at the same time. For a while, only the slight crackling sound of the burning fire could be heard from time to time.

Looking at the meat that was about to be burnt, Cheng Xi wanted to remind him aloud, but before he could speak out, the girl asked, "Do you think it is possible for people to return to the real past?"

Cheng Xi froze for a moment, what the hell kind of question is this?

"I mean..." Seeing the confusion on Cheng Xi's face, the girl rearranged her words and continued: "If a person can go back to the past, is it really the past she knows?"

In other words, is it possible for the future to actually be changed?

It's a question that's been on her mind, and one that everyone takes for granted when it comes to time travel:

If I really traveled through the timeline to the past, will the people and things that originally existed in that future disappear, or will they continue to exist?

If it is the latter, it means that what she is experiencing now is not the "past" she is familiar with, and what she has changed is not the "future" she wants.If this is the case, is there any point in what she has done and insisted on so far?

There was a trace of confusion in the girl's eyes.

"Why do you want to ask this kind of question all of a sudden?" Cheng Xi looked at her suspiciously, but since the girl asked this question, he should answer it seriously.

"When it comes to time travel, one point that cannot be avoided is the 'grandfather paradox'." He - said.

This can be regarded as the most well-known paradox in the theory of time travel, and the content is also very simple, that is, if a person suddenly has a brain twitch and wants to go back to the past to kill his grandfather, assuming that he really succeeds in the end, but in this way If he came, he would not be born in this world, and it would be impossible to travel through time and space to kill his grandfather, so the paradox appeared.

"Therefore, in order to perfectly explain the 'grandfather paradox', people later studied many theories, the most famous of which are probably the 'parallel universe theory' and the 'world line theory'." Cheng Xi continued. .

Cheng Xi was not surprised to see the puzzled look on the girl's face. After all, although the girl is extremely intelligent, she has not been exposed to relevant theoretical knowledge before due to the constraints of the times, so it is normal to be confused.It's the same when you go to explain the principle of nuclear fusion to Newton, he will definitely listen in the beginning with a confused face.

Oh, it seems that "she" should be used here.

But in fact, these two theories are not profound, and the girl should be able to understand it with a little explanation.

"According to the explanation of the parallel universe theory, when you use the time machine to go back in time and kill your grandfather, the world will split into two parallel worlds, one of which is your grandfather is dead, and in the other world your grandfather is dead. Grandpa is still alive, and you who traveled through time came from the parallel world behind."

Hearing this, Guan Xing's heart suddenly tightened, she bit her lip lightly, and asked with complicated feelings: "Then... what about the original world?"

"Of course I followed the original track." Cheng Xi replied in a natural tone.

Unaware of the strange emotion on the girl's face, he continued: "Under the theory of the world line, when the past changes, the world line will split into two, and the world will move towards the new world line. Offset occurred."

"It may sound similar to the theory of parallel universes, but there is an essential difference between them." Cheng Xi explained: "The world line theory is a theory of a single universe. Other worlds only exist in possibilities, and there is only one world, which is the real world." Change the past in a sense.”

"World line... change the past..." Guan Xing muttered in a low voice, and after a while he raised his head and continued to ask: "Then... which theory do you think is true and correct?"

There was an imperceptible trace of hope hidden in the girl's words, but in fact, even she herself didn't know which answer she wanted to hear.This is a terrible thing, but she hasn't noticed it yet.

"Me?" Cheng Xi shook his head when he heard the words: "I don't think a time machine can exist, even if it is really built, it's useless."

"Eh?" The unexpected answer stunned Guan Xing for a moment, and then frowned: "It's useless if it's made... Don't you think it can't exist?"

"These two points don't conflict." Cheng Xi spread his hands and said, "At least in terms of the concept of a time machine."

Although his point of view lacks factual basis, it can be easily proved logically.

"First of all, let's talk about the theory of parallel universes." Cheng Xi drew two parallel lines on the ground with a branch: "There are two possibilities here. One is that parallel worlds are not allowed to communicate...but since I can appear here , this possibility has been denied.”

As he said that, he drew another line with a branch, connecting the two parallel lines together: "The second possibility is that parallel worlds allow intercommunication, which is fun."

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

"We assume that there is a time machine. As long as people change the past once, a new parallel universe will be split, and there will be people in the new universe who will continue to change the past... As more and more universes are born, the number of parallel universes will increase. It will grow exponentially, eventually going to infinity."

In fact, it is a bit incorrect to say that. The actual situation is that the moment the time machine is manufactured, the number of parallel universes will tend from one to infinity, which is determined by the characteristics of time itself.

Cheng Xi continued: "We know that under the terrifyingly large base of infinity, the occurrence of any low-probability event will eventually become inevitable."

"Since we have previously proved that intercommunication is allowed between parallel universes, the probability that an object in one of the universes will travel to the world we are in now is not zero..."

0 ......

"Then under the premise that there are infinitely many parallel universes, this thing must happen!" Guan Xing understood quickly.

Cheng Xi nodded and continued: "Now let's assume an event with a lower probability. This object happens to pass through in front of us at this moment... Although the probability is very low, it is definitely not zero."

Stargazer understood why the teenager said he didn't think a time machine existed.With an infinite base, any low-probability event will inevitably happen, and if it doesn't happen, it can only show that there is something wrong with the theory itself.

"This proves that, according to the explanation of the parallel universe theory, either time machines do not exist, or parallel universes are not allowed to communicate with each other, or..." Cheng Xi paused and continued: "The parallel universe theory is wrong. "

"What about the world line theory?" Guan Xing asked.

"The principle is the same." Cheng Xi wiped away the lines on the ground, leaving only a line segment: "As long as the time machine exists, the world line will inevitably be constantly changed. Under the never-ending changes, the world will eventually move towards a stable path. Yes, there is no timeline for a time machine."

"..." Guan Xing now understands what Cheng Xi meant by "It's useless if it's made" just now.