The Self Consistency Principle of Time Travel

According to novako's self, consistency principle, people can go back in time. But they cannot change history. A time traveller would be forced to act in such a way that a paradox couldn't occur. Ultimately, our world is a final ending that has been revised countless times. And this principle is the governing standard of time travel. All our experiments have cleaved to this principle. Crossing over isn't as simple as you have it in your novels or your favorite film about time.