Anyone who has watched "Magic Girl Madoka", "Your Name", "Doraemon" and other works knows that even if the cause of the disaster and the way to avoid danger are fully known afterwards, it is very difficult to save lives by means of crossing. .
The protagonist of this play has been ignorant of the truth of the matter for decades. After being forced into a corner, he is forced to travel back in time, using known clues (the time of the crime, the object of the crime) to investigate the truth and save the victims.
Its difficulty can be imagined.
According to the butterfly effect theory, it is easy to change the original branch of the universe through time travel, but it is difficult to put the world into an ideal parallel orbit. Any small change can affect countless plot lines, which can have a disastrous effect on subsequent development. Therefore, in order to reduce the screenwriter's pressure on script debugging, my country has completely banned the filming of time-travel dramas.
In contrast, Conan, Kindaichi, Tenichi Goro and others traced back the crime process through post-event clues, which avoided the impact of the observational effect of solving the case on the results to a certain extent, and the operation difficulty at this time was much less.
Due to many difficulties, although crossing the master timeline can repair the disaster ending to a certain extent, it may not get the ideal branch. In addition, by debugging the world through time travel, it is necessary to carefully maintain the original operating principles of justice, axiom, customs, and morality in the world, so as to prevent the partially modified world from getting out of control and collapsing.
At present, there are already many well-known anime protagonists with the ability to travel, so it is likely that many people have actually carried out travel activities intentionally or unintentionally since ancient times, and there must be some people with ghosts. However, today's world has not been brought under the rule of darkness by the traversers using its convenience. I think it must also be because of the butterfly effect. Any crossing that goes against the good purpose will destroy the justice order of the world and eventually lead to the revised The universe is going out of control and collapsing, and according to the survivor theory, we will not appear in such a branch of the universe.
However, if there were enough traversers in the world, there may have been some less noble traversal operations that have been successfully implanted into the mainline of the current world, and these operations eventually led to some chronic diseases and disasters in the current world. Moreover, we do not know very well how many conspiracy theories refer to the dark behind-the-scenes ruling groups in the world today. However, these disasters may not be enough to cause justice to be completely destroyed, so over time the laws of justice in the universe should be re-established. After all, many theories about humans and societies assume that the world is going for the better.
But pessimistically speaking, the gradual improvement of human society is likely to be just an illusion of observation of a single cosmic timeline. If the number of evil traversers far exceeds our estimates, each time taking the universe into a worse parallel branch, then even in the best of times in current history, we are in the worst of all branches of history. bad world. The most important foundation of justice and rationality is the law of causality, and once a crossing occurs, the law of causality will be seriously damaged. In the various branches, some seemingly good branches do not exist logically because evil traversers are destined to appear, just like the branches in the program that will never be visited.
In all parallel universes, the traveler has the ability to change the branch of the universe, but most people only have the cognition of the current time line, so the world is just an illusion to most people, and it is difficult for the few who know the truth. Uniformed monster. If travelers can meet, then it will be more difficult for a single traveler to control history, and the world depends entirely on the battle of travelers. Why do heroes emerge in troubled times? At a critical moment in history, many traversers will definitely gather to fight each other. In this kind of struggle, it is not the strength that determines the winning or losing, but the limit of the number of crossings. If the struggle is a contest of rock-paper-scissors, each loser will definitely traverse back to modify his own strategy, and let the historical conversion cycle infinitely until one side has exhausted the number of crossings.
Therefore, traversal must also have its own rules, and the physical laws of the real world are the combination of the one-line law and the traversal law. Classical mechanics is more like a single-line law of world development, while modern physics considers the impact of crossing laws on single-line history. With regard to the study of human morality and axioms, two different effects should also be considered: full causality and cross-causal effects. Can human beings finally defeat the evil transmigrators? Or is the world doomed to an infinite loop between single-track development and branching downgrades? I believe that future moral scholars will give us an answer.
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