For starters, that’s a rather simple principle of Time Travel right there – and according to the pioneers of time travel, it’s one of the foundation stones of the Theory behind it. It’s something of a paradox – a mind-boggling annotation in the ever-puzzling and ever growing Anals of History. (Some readers may still be thinking that should be ‘Annals’ – however, the author of this work cannot be blamed for what you may think.)