A very representative story of time paradox

1945 One day, a mysterious baby girl appeared in an orphanage in Cleveland. No one knows who her parents are. She grew up alone and no one interacted with her.

It was not until one day in 1963 that she fell in love with a tramp for no reason, and things got better. But the good times did not last long, and unfortunate things happened one after another. First, when she found out that she was pregnant with the child of a tramp, the tramp suddenly disappeared. Secondly, when she gave birth in the hospital, the doctor found that she was bisexual, which means that she had both male and female organs. In order to save her life, the hospital gave her a sex-change operation and she became him. Most unfortunately, the little girl she just gave birth to was kidnapped by a mysterious person. This series of blows made him never recover, and finally he became a homeless tramp on the street.

Until one day in 1978, he walked into a small bar drunk and told an elderly bartender about his misfortune. The bartender sympathized with him and offered to help him find the homeless man who got him pregnant and disappeared. The only condition is that he must join their' time travel special forces'.

They got on the "time flying car" together. When the flying car went back to' 63, the man let the tramp out. The tramp inexplicably fell in love with a girl who grew up in an orphanage and got her pregnant. The man took a "time flying car" for more than 9 months, snatched the newborn baby girl from the hospital, took the baby girl back to 1945 with the "time flying car", and quietly put her in an orphanage in Cleveland. Then he brought the muddleheaded tramp to 1985 and let him join their' time travel special forces'. After the tramp got a formal job, his life was on the right track. And gradually mixed into a quite good position in the special forces. Once, in order to complete a special task, the superior sent him back to 1970, disguised as a bar buddy and pulled a tramp to join their special forces.

The man went back to the past and became his mother and father. His world line is very complicated, everyone is himself, forming a cycle, which is theoretically possible. According to the theory of quantum mechanics, if someone has enough energy, he can always make a macroscopic object appear at the same time (associated with antiparticles with the same mass but opposite charge). This is unlikely to happen. It is even more impossible to find a table that circulates in time and space than to find 1 folder, and it is even more impossible to find a folder than to find 1 electron. The heavier and more complex the macro elf is, the rarer it is.