About the plot loophole of the destination before the movie.

In fact, there are still some loopholes in this movie. Why? Because it is an infinite loop with no beginning and no end, and the plot is circular, theoretically speaking, the baby is the head and the bomber is the tail, but it doesn't make sense. Just like the chicken or the egg came first, any point can be used as the beginning, so the director takes the disfigured fragment as the beginning to improve the viewing, otherwise it won't be interesting to let the audience know that the space-time man is John. But the plot is not difficult to understand. He promised not to be a bomb maniac, but he finally became one. According to probability, although the same person's thinking is the same, there will definitely be differences in many cycles. Maybe one day, the bomber will not change his mind properly, or John's heart will not sleep with Jane, and the infinite cycle will be solved. It can only be said that what happened at the same time and space will not change, because it has already happened, but the protagonist himself has never experienced it personally and does not believe it.