Obviously, Mitsuki Umihara is serious. Although Ateola really didn't understand why he took this seemingly ethereal philosophical concept so seriously. Of course, Mitsuki Umihara could also see her true thoughts in her seemingly unchanged expression—he found that he had gradually been able to read something from Satéola's expression.

"You think I'm talking about unrealistic hypotheses?"

Sattella was silent, but it was clear that she had thought so.

No matter how you think about it, this is beyond the scope of superpower research. Sattella doesn't believe that anyone can continue to study on this path, or even achieve results.

The most important thing is that no one is capable of arbitrarily distorting things. Even if all abilities are regarded as a collection, it is far from this concept.

"Maybe it's not that complicated. Inconceivable probabilities aren't just limited to the abilities we are familiar with. Mitsuki Umihara didn't know what kind of dumb riddle he was playing, and Sateaula frowned when he heard it. For example, the birth of each of us is an incredible probability, and the denominator of this probability is even comparable to the total number of human beings. Since Satella is a woman, Umihara deliberately chose a subtle statement). That is, the composition of humanity is as it is now, and the probability is one multiplied by two billions. It's an incredibly small probability, but absolutely no one would feel that they were born in such a low-probability world. Because it is clear that the premise of being able to feel that the probability of the composition of human beings is so low, the composition of the human race must be like this. That's the anthropic principle, you can understand it, right? ”

Satella nodded, it was indeed an easy concept to understand. As he said, everyone's birth is a low-probability event, but it would be ridiculous for anyone to say that their existence is inconceivable because of this. Because obviously, the premise of this person being able to say this is that he must exist, otherwise there would be no such person as him to say this.

The concept is simple. But what Mitsuki Umihara wants to say is another concept with the same logic, but rather terrifying.

"You know what? There are constants in the universe that determine what the universe looks like. As long as they change slightly, the universe will be different. It is these constants that allow us humans to exist. But the question is, why are they the way they are? It is clear that there is no need for the universe to accommodate us humans. For the universe, we humans are just too inconspicuous creatures to live on a planet the size of dust. If it is explained by the principle of anthropic, the universe must be the way it is, because if it were not so, there would be no human beings at all to ask this question. It's arrogant, but weirdly, it's probably a fact. ”

"Why?"

Such an uncomfortable concept that even Sathera wanted to scoff at.

Mitsuki Umihara smiled and said an answer that sounded like he had heard it wrong.

"Because of the Dragon."

No matter how you think about it,It's not like a term that could appear in the school city.。 But the problem is that Mitsuki Umihara doesn't seem to be joking.

Of course, Sateola's reaction was also expected by Mitsuki Haihara. This is indeed a somewhat unimaginable explanation, but Mitsuki Umihara is confident that she can understand.

The premise is that she learns well enough to know a concept that is not too complicated.

"Do you know Feynman's path points?"

If Sateola's answer was that she didn't know, then Mitsuki Umihara would definitely dismiss the idea of giving her any explanation.

"The one of quantum mechanics?"

Sattella replied immediately. As soon as he heard her answer, Mitsuki Kaihara knew that there was no obstacle to understanding.

"Yes. As path integrals show, in physics we can't delve into the process by which a particle gets to its end position, because it's actually the sum of all possibilities. It's like we can't delve into how a particle diffracts through the slit at the same time in the form of a wave and becomes a point behind the slit. This intermediate process is just a mathematical wave function, and all we can determine is the result. However, there are always those who want to think about this inference and see if they can get some interesting results. Among them, Mr. Schrödinger is one, and this gentleman has made a maddening cat. Mr. John Wheeler is the other one, who has discovered a terrifying monster hidden in quantum theory. Of course, like Schrödinger, Wheeler's discovery came from a hypothetical experiment. The difference is that this experiment is achievable. ”

As he spoke, Mitsuki Umihara took out his mobile phone and drew a picture on the tablet. He beckoned to Satéola and motioned for her to come over and take a look.

"This experiment is similar to the double-slit interference experiment, except that instead of the double-slit experiment, a spectroscopic experiment is used. Assuming that a photon is released from a light source and a semi-reflective realm is placed in front of the light source at an angle of 45 degrees, the probability of the photon penetrating the semi-reflector and being reflected is 50% each. The path traveled by the penetrating light is A, and the path traveled by the reflected light is B. And then we. Place a total mirror on each of the two paths and adjust the angle so that they converge to the same point. Behind this point, we can use instruments to measure to determine which direction the photons are coming from. ”

Sateaora didn't quite understand the significance of this experiment, and she looked up at Mitsuki Umihara. Suddenly, she found that Umihara's handsome side face was close in front of her, and she had never been so close to a boy before. She shook her head vigorously and stepped away a little.

Not noticing her reaction, Mitsuki Umihara continued.

"Next, we put another half-mirror at the convergence point to interfere with the light. This is the same as the double-slit experiment, where we can see that light comes from two paths at the same time. ”

Sattella nodded. It was indeed an experiment with the same meaning as the classic double-slit experiment, but she didn't understand what it could mean.

"Look, the monster is hidden in this, hidden in these two paths. You know, the speed of light is fixed, absolute. Imagine if we were to put in the second half mirror when the light had just passed through the first half-mirror...... Do you understand what I mean? ”

“？”

"That is, if we put in a second half-mirror, the photons come from both paths at the same time. And if you don't put in a second half-mirror, the photons come from only one path. The crux of the matter is that there is an upper limit to the speed of light, and whether or not to put in the second half-mirror, we can decide after the photon passes through the first half-mirror and before it reaches the end point. The photon has already traveled this distance, and we can choose how it traveled when it reaches the end. This is Wheeler's 'delayed choice experiment', which is not just a thought experiment, but a real experiment that can be proven, and has long been proven.

Think about what that means. If history can decide how it happened after it happened, why isn't that the universe? The universe is a huge wave function, and although it has existed for more than 13.8 billion years, it has not had a definite form until it was observed. Until an intelligent observer comes along and sees the result, the wave function collapses, and we have the current universe.

"In fact, the present universe is an incredible miracle. There are so many unbelievable low probability constants that allow us to exist. Mathematically, I have a hard time believing that this is a coincidence. But if it weren't for such a coincidence, we wouldn't be asking this question. Wheeler now tells us that even though the universe itself is an indeterminate superposition, it can be determined that a process that has taken place for 13.8 billion years while we see the results. Perhaps our present existence has created theories about why we exist, or even why the universe is the way it is. The existence of our human beings distorts the probabilities of the almost infinite forms of existence in the universe, and only obtains its only possibility. The universe exists because of us, and we, as the creators of the universe, participated in the creation of the universe. Reality has been distorted.

"This is the monster that Wheeler discovered, and it is now commonly called the Dragon, Wheeler's Dragon. A dragon whose only 'dragon head' (observations) are determined, and whose body is completely misty. ”

Speaking of this, Mitsuki Haihara suddenly showed a wry smile.

"Every time I think of this dragon, I imagine a possibility. If there is a person who restores distorted probabilities to purely mathematical probabilities that are not distorted by personal observations, will the universe also be restored to pure probabilities? If this happens, the possibility that we humans still exist is very small, and it is more likely that there is no universe at all. Could this person be like an invisible hand, tearing apart the universe as we know it? This seems to be too surreal, too unbelievable. Perhaps, I have also gone too far in metaphysical philosophy. ”

It's too surreal, it's too incredible.

Mitsuki Umihara is not wrong at all, and this is the only sentence that can be used to describe this fact.

Sattella looked up blankly, staring at the sky that was dyed a thin red.

There, at the end of the line of sight, there is the beginning of the universe, which is where things begin, and where all things become all things.

She studied well, so she was able to understand the surreal concept that Mitsuki Umihara was talking about. But once you understand it, it makes people feel that it may be better not to understand. Because the meaning of this is really chilling.

There are too many, too many probabilities in the universe, which can be summed up in this way. Even the possibilities contained in string theory are so incredible that there is no reason why one of them is a certainty.

Unless, it is because this is the only possibility that we humans can exist.

Strong nuclear force, weak nuclear force, electromagnetic force, gravitational force. This opens up the four forces of events, the four forces that shape all things, all from the same starting point.

Who asked them to come? (Note 1:) Aren't they self-evident?

The delayed choice experiment reveals a surprising secret: an event can be decided after it has happened and then decide how it happened.

Perhaps, because of the existence of people, they have their current appearance?

Because we exist, they must be what they are. Otherwise, we wouldn't be able to raise the issue.

Perhaps, human beings are not only the creators of all things, but also the creators of all things.

Satera's gaze was somewhat distracted into the boundless sky, until a young girl's figure slipped through the infinite expanse of the setting.

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Note 1: This is the Nobel Prize winner in physics, Isido? Isaac? Rabbi blurted out the words after hearing the news of the discovery of the meson, which represented the birth of modern particle physics.