Each of us has thought about what the future looks like, our fate has long been decided, but we can't see how to change our future. And often troubled by these questions, which is a philosophical problem, but philosophy is often also related to science.
All of us have been predicting the future all our lives, whether it is buying lottery tickets or stocks, or guessing questions on exams, every purpose we do is predicting the future, because the purpose is in the future, but also know that predicting the future is a difficult thing, who can accurately predict the future, then this person is invincible.
From ancient times to the present, people are also looking for the direction of predicting the future, one is theological direction, the other is scientific direction. Theological direction is also what we usually call fortune telling for divination, looking at the constellations of the palm and other behaviors. Predicting the future sounds like a very idealistic thing, can science also predict the future, the answer is yes, and theoretically it is accurate prediction, this thing that can accurately predict the future It is called laplace's demon or Laplace's demon, is a monster.
This monster was derived by the French mathematician Pierre Laplace more than 200 years ago through the "Theory of Cause and Effect". This Laplace is a character, he predicted the existence of black holes more than 100 years before Einstein, but at that time it was not called black holes, he felt that there should be such a thing in the sky, sucking everything into it, and then Einstein deduced through the "Theory of Relativity" that black holes might exist, and now we have observed black holes. Laplace also predicted another thing that existed in the world, and that was this monster.
Laplace said that this monster can not only predict the future but also determine the past, that is, know the past and the present, and know everything. Although the past has happened with certainty, there are many things you can't prove, so many mysteries in history, so many legends, we have not seen, but Laplace can be sure of this past.
Although no one has ever seen this monster, it is theoretically true. Since Laplace deduced the monster 200 years ago, all the physicists in the world have tried to prove that it does not exist. Why is it to prove that it does not exist and not to prove that it exists, because if it exists it will bring great trouble to science, which may lead to the collapse of science, but it is derived from science, not imagined things. Most yokai come up with it, and calling it a yokai is because it causes a lot of trouble for science. Just like the quantum mechanics of that year, when it first came out, everyone thought it was a monster, how the physical world was determined by subjectivity, and finally proved that it was correct, so quantum mechanics was created to explain it, it could not be eliminated as a monster, then a theory had to be created to explain it.
So what exactly is Laplace's demon? Laplace's original words are this: we can regard the present state of the universe as its past and future causes, and if a wise man knows at a certain moment all the forces that motivate the movement of nature and the positions of the natural objects that make up it, and he has the ability to analyze these data, then in the universe their motion from the largest object to the smallest particle will be contained in a simple formula, for which nothing is ambiguous, and the future will appear before his eyes as it was in the past. To put it simply, there is a very powerful intelligent being in this universe, and if he knows the current state of all matter in the universe, and every object will move according to the definite laws of physics, then theoretically where they are in the next second is determined. It also means that the future in the universe is certain.
If Causality is correct, then the present state is the result of the past, so if the past is determined, the present is also determined, and the present is the cause of the future, so the present is determined, the future is determined, and this definite future can be calculated through formulas through the past. In the same way, we can use the present to calculate the past, that is, from the moment the universe was born, to the moment of the destruction of the universe, everything is determined, and it is at the moment when the universe is born.
This is not theology, it is deduced through the theory of causation, which is the foundation of science, and as long as science is established, then the past and the future are also certain. Theoretically, there is such a thing that can calculate the past and the future, and this thing that can calculate the past and the future is called Laplace's demon. This demon is also theologically all-knowing and all-powerful God.
The most crucial key to the existence of Laplace's demonic existence lies in whether causality is correct, and science has always believed that it is correct, but if "Causality" is true, then the world will determine all the fates at the moment of the birth of the universe, including the birth of all of us now, what to eat, and what to eat now, wrapped up in reading my article now, are all determined. It's not because your will determines what you want to eat and what you want to see, but it was decided a long, long time ago.
You may feel that what you eat and wear today is determined by your mood, and your sudden thoughts may also change that thought. Let's find an example to illustrate, you should have clicked on my article a few minutes ago, at this time we let the time flow back, back to the second before the click open, this is not only your personal time is going backwards, but the time of the whole universe is flowing back, your memory and thoughts are back to that state at that time, then will you still click on this article? All the states are back to that moment, then you will still click on this article and will not change.
That is to say, everything that happens now is actually caused by a certain reason of the original, and if this cause is not changed, the result will not change. And the reason is that it can be pushed forward all the way to the moment when the universe is born.
Have you ever thought about the friends around you, why they will meet you, what things are holding us together in the dark, in fact, it is decided at the moment of the birth of the universe, this fate and fate were decided very early. This theory is called "Determinism", which was originally a scientific category, but later it was not understood, so it was put into philosophy. But science and philosophy itself are inseparable, and philosophy is also the basis of science, and our current classical physics is based on determinism.
All our behavior is determined by the brain, and the brain is also a physical existence, since it is a physical existence, then according to the physical formula can be calculated, all the electrical signals in my brain can be calculated, then our thinking, our thoughts, our decisions are predictable.
But laplace demons have a big debate, that is, if the future can be predicted, then can it be changed? If we really calculate a future outcome, but we change it, then the result doesn't happen, it becomes that the prediction is inaccurate, and the plot of the movie Minority Report appears. That is to say, prediction and change cannot exist at the same time, which is a contradiction.
Scientists once wanted to use the characteristics of micro-uncertainty in quantum mechanics to overthrow Laplace's demon, but later found that it could not be overthrown, because we do not understand quantum mechanics at all, how can we use something that we do not understand to overthrow another thing that we do not understand. And quantum mechanics is always in the microscopic world, and our macroscopic world has never had such uncertainties.
Later, various methods such as thermodynamics or entropy were used to prove that it did not exist, but none of them could really be overturned. That can't prove that he doesn't exist, then there's no way to make one, and there's no way to make it at the moment. There are a few serious problems that cannot be overcome, that is, the demon of Laplace may not be able to calculate the entire universe, because it cannot calculate itself, as long as it is still in this universe, it cannot calculate itself. And if you want to calculate the energy required for the whole universe, it may be all the energy of this universe, so as long as it is calculated at the beginning, all the energy of this universe will be consumed by it, and the universe will be destroyed.
However, it is not impossible to solve, that is, in the parallel universe to calculate the past and future of another universe, and then transmit the information through gravity or quantum entanglement, but whether the parallel universe exists has not yet been proven, even if it exists, how to transmit the quantum to that parallel universe is not known.
So if there is an all-knowing and all-powerful god or the demon of Laplace, then he cannot be in this universe.
Although it seems to be a very unlikely thing, but many things are also from impossible to possible, the weather was difficult to predict in the past, and now with the increase of computing data, the increase of computing power, the prediction of weather is becoming more and more accurate. So whether this demon does not exist or not, we can wait for the future us to give the answer, maybe we can't wait for this answer, but this answer must exist.