paradoxes
What is the Pinocchio paradox?
The paradox in which if Pinocchio says "my nose is about to grow" and it does, then it means Pinocchio wasn't lying, and his nose shouldn't have grown.
What is the grandpa paradox?
The paradox in which if you built a time machine and went back in time to kill your grandpa as a little boy, then he wouldn't of met your grandma, and either your father or your mother wouldn't exist so they wouldn't of met, so you wouldn't exist to kill your grandpa.