What are Grandfather Paradoxes?
A Grandfather Paradox is a time travel paradox that occurs when you go back in time and kill your own grandparent, preventing them from having children, which in turn means you never existed. It's like a time loop of non-existence. But don't worry, it's not all bad! You can just go back in time and kill your grandparent again, and again, and again... until you get it right!
Or, you know, just don't do that. That's a lot of work. Maybe just have a nice cup of tea with your grandparent instead. That's a paradox that's a lot easier to manage.