A comprehensive guide to navigating the treacherous waters of time travel.
Also known as the 'Predestination Theorem', this paradox states that any event that occurs must have a cause, but if it's caused, it must have a cause for its cause, and so on ad infinitum. Or, in simpler terms, don't mess with the timeline, or you'll mess up the timeline, and then you'll mess up the mess.
A paradox where information or matter can be created from nothing, simply because it's not possible to create information or matter from nothing. Confusing, isn't it? Try not to think too hard, or you'll go mad.
Disclaimer: Time travel can cause irreparable damage to your sanity. Prolonged exposure may lead to spontaneous combustion, paradoxical madness, or, you know, just a nice nap in a quiet alleyway.