It is said that the sun will not destroy the earth in middle age, but won't people die in middle age?

This is normal. All the scientific assumptions we make are accidental inferences.

Take palm reading as an example. According to your family background, hand prints, etc. The fortune teller infers that someone can live to be 80 years old, but this may mean that he was killed by a car as soon as he went out!

It is also the assumption that the sun and the earth can exist for many years, which conforms to the general laws of science. However, maybe one day the solar system will hit another galaxy, and the celestial bodies in the center of the two galaxies will be torn apart by gravity. Or suddenly and inexplicably, a black hole appeared and swallowed up the earth?

Didn't you see that CERN's hadron collision experiment caused street chaos in India last year because someone predicted that there might be a black hole?

In fact, this is a question of probability.

We come to the conclusion that the life span of the sun is several billion years, which is a statistical average based on astronomical observation and physical and mathematical calculation of other similar celestial bodies. I remember once upon a time, a famous lecturer came to our school (Sichuan University) to give a speech, saying that Chengdu has a population of 65 million and there are 1/500 people infected with AIDS, which means that after having sex with 500 people, the probability of contracting AIDS is only 1. So, he came to the conclusion that 1/500 is a very small probability, which can be basically ignored ... can it be ignored? Anyone who has studied mathematics a little knows that 1/500 is a collective probability, which depends on individuals. That is the relationship between 100% and 0%, and there is no probability of 1/500.

So you should distinguish the difference between collective probability and individual probability, otherwise, how can you say "when gods fight, mortals suffer"? This is purely accidental, something that cannot be counted, and a law.