And in response to your paradox argument, I have to draw on my vast knowledge of all things Back to the Future to make a rebuttal. Now, according to Doc Brown, the effects of a paradox would cause the dustruction of the universe due to it not being able to logically be accomplished. But there's also the "Space-Time Preservation Theory" that claims that the universe is able to keep itself on course (like a river) and keep things from happening that would lead to a paradox (similar to the Greek principle of dike), so, according to that theory, there would always be some obstacle preventing you from killing your own grandfather.
And in response to your paradox argument, I have to draw on my vast knowledge of all things Back to the Future to make a rebuttal. Now, according to Doc Brown, the effects of a paradox would cause the dustruction of the universe due to it not being able to logically be accomplished. But there's also the "Space-Time Preservation Theory" that claims that the universe is able to keep itself on course (like a river) and keep things from happening that would lead to a paradox (similar to the Greek principle of dike), so, according to that theory, there would always be some obstacle preventing you from killing your own grandfather.