Liu Siqi's words left Jiang Yu perplexed. "If it wasn't us, then who was it?"
"It's complicated to explain," Liu Siqi said. "First, I have to start with the holes in the universe.
"Oh, because this communication is quite special, I can talk about some future technology and theories, but please it's best not to disclose them, because according to our multiple calculations, once you know about the technology of future people, the more you progress, the worse it gets!"
Without waiting for Jiang Yu to reply, he continued, "As we gain a deeper understanding of the universe, we've found that there are many blind zones in time and space.
"The hallmark of a God-level Civilization is the beginning of the exploitation of these blind zones to achieve what was once impossible, such as eradicating an enemy's past.
"'Temporal Chaos' is the biggest blind zone in time, just as Thirty-Six has speculated, time doesn't have a normal order at all.
"This suggests that causality doesn't hold because the present, past, and future exist together.
"Even if the past was changed, the present remains the present and won't undergo any change because the present is already a fait accompli and can't be altered.
"And the changed past will evolve into a new future.
"It is as if humanity once had a common starting point where some human universes escaped the Two-Dimensional Strike while others did not.
"This created two futures which do not interfere with each other, and both futures will extend into two different universes.
"This is the change that time brings to the spatial dimensions of the universe, and it is also the origin of parallel universes.
"At this point, time and space can no longer be considered separately, and the parallel universes formed aren't copies of the entire universe but rather relatively new ones.
"That is, the universe is still the same grand universe, but relative to us observers, it's two different universes.
"We call this subjective observation, meaning the actual state of the universe doesn't align with our observations and deductions, yet our observations and deductions are indeed correct.
"On a large enough scale, many aspects of the universe are both 'yes' and 'no'.
"Or we think 'yes' is yes and 'no' is no, these are the spatial, temporal, or abstract chaotic blind zones."
Jiang Yu got a bit of a headache listening to this. "You should have a good chat with Thirty-Six about this."
Liu Siqi laughed, "These theories are all based on the foundation laid by Thirty-Six.
"It was he who proposed 'the uncertainty of laws' because continuing to study the macro and micro of the universe reveals increasingly severe uncertainty in physics and more chaos in the universe.
"Often it's not that we can't summarize the laws, but rather that in many places, the universe simply has no laws at all.
"Jiang Shiliu is always searching for the 'Information Convergence Point.' Perhaps only after reaching that height can we fully understand the universe."
He paused, then continued, "I believe that in one of humanity's futures, we have reached such a height.
"At that time, what we now perceive as chaos and uncertainty will be following certain rules.
"And the universes formed by different futures will also become very clear at that time.
"Therefore, they can do more, such as helping the humans in some universes.
"And so, we welcomed Wallfacer Jiang Yu. It's hard to imagine what it would be like without your world; perhaps humanity would have been extinct by now."
It wasn't that bad, just that the core of humanity suffered a catastrophic blow.
Jiang Yu said, "I think I understand, that is, the universe we see is actually the universe that belongs solely to our civilization."
"When our civilization expands this much, the universe is that big,"
"Then does each civilization also have its own universe?"
Liu Siqi corrected, "You have only understood a very superficial layer, please don't make such a definite distinction in space, because the boundary between the macrocosm and the microcosms is very vague.
"Let me give you an example. Civilizations 1 and 2 evolve and develop simultaneously. During its development, civilization 1 encounters a major issue where a serious divergence occurs, different choices leading to futures 1 and 1.1.
"Of course, change could also come externally, such as the invasion of the Trisolarans. We fought the Trisolarans for centuries in our history, but had we not encountered the invasion, that would have been another future.
"In short, it's easy for such bifurcations to happen in the development of a civilization.
"After the split, 1 and 1.1 will each create new time fragments and thereby form different universes.
"Such universes are where civilizations 1 and 2 coexist as well as where 1.1 and 2 coexist. To civilization 2, civilizations 1 and 1.1 are always one and the same.
"You might think of it this way, the relationship between civilizations 1, 1.1, and 2 is a state of overlap."
"If civilization 1 continues to evolve, it might never come into contact with civilization 2, and so the universe keeps moving forward.
"If civilization 1.1, due to different choices, makes contact with civilization 2 in the future, then civilization 2 will also branch out into 2.1.
"At that time, civilizations 1 and 2 that never made contact will be in one parallel universe, and civilizations 1.1 and 2.1 that did make contact will be in another parallel universe."
"Anyway, civilization 2.1, unless it has access to the Information Convergence Point, will only ever know about civilization 1.1 and will be forever unaware of the existence of civilization 1."
Jiang Yu pondered for a long time before saying, "Can I understand it this way: The macrocosm is like a big bowl of soapy water.
"Different futures that develop into different parallel universes are like the bubbles I blow, regardless of how many parallel universes there are, they're all in this big bowl of the macrocosm."
"That's roughly the idea."
Jiang Yu frowned, "That being said, space is not absolute, it can change differently depending on the observer?"
Liu Siqi smiled, "Sounds chaotic, doesn't it? But that's indeed how it is, Space exists in an overlapping state, and the boundaries between overlapping spaces are vague and even abstract.
"That's why I said, don't be so focused on distinguishing the macrocosm from parallel universes, just consider them as two abstract spatial existences.
"In such circumstances, Stitchers come into play.
"First, future people who have mastered the Information Convergence Point want to help a very unsuccessful humanity in a parallel universe that has made many wrong decisions. If they directly intervene in the past of the failing humanity, this universe will branch into new futures due to the external influence.
"So the fate of the failing humanity hasn't changed.
"Besides, the future people cannot exist in the past for a long time, as that could easily break down their ability to mentally sequence time.
"Once that ability is damaged or compromised, that person will no longer be able to distinguish from which era they are.
"Their consciousness will be completely immersed in Temporal Chaos, just like those patients who are unable to sequence time. I remember in your era there was an example, a student of Dean Lix.
"That's where stitching is needed, stitching the appropriate consciousness into the universe of the failing humanity. This sort of intervention is justified, and the present and future of that parallel universe will also change without being rejected by time and the universe.
"It's a cheating technique that uses the Blind Zone of the universe, generally unable to provide too direct help, only able to use the Stitcher's perspective to guide humanity to make the right choices."
Jiang Yu laughed, "Are you explaining why the Wallfacer's Shop is so mediocre?"