THE GRANDFATHER PARADOX

The grandfather paradox. Imagine you build a time machine. You travel back to 1920. You accidentally prevent your grandfather from meeting your grandmother. They never fall in love. They never marry. They never have children. Which means your parent was never born. Which means you were never born. Which means you could not have travelled back. But if you never existed, you could not have travelled back in time. Which means you never prevented your grandfather from meeting your grandmother. Which means your grandparents do meet. Which means your parent is born. Which means you are born. Which means you travel back again. You prevent them meeting again. Which means you prevent them from meeting. Which means you are never born again. The loop begins again. The grandfather paradox. The most famous problem in time travel. A closed logical loop with no possible resolution. There are three possible escapes. The first is fixed timeline. You cannot actually change the past. Whatever you do when you travel back is always been part of the timeline. If you try to prevent your grandparents from meeting something will always stop you. The second is parallel universes. When you travel back and change something you create a branching alternate timeline. Your grandparents never meet in that branch, but the original timeline still exists. You still exist in it. Both exist simultaneously. The third is the simplest. Time travel to the past is simply impossible. The paradox cannot occur because you can never go back in the first place.