In which circumstance do killing your self past automatically eliminates you from existence? Why are all depictions of time travel wrong, in this regard?
Time travel as a concept is already insane. Reversing entropy in the entire universe but maintaining about 100kg of matter intact is contradictory, to say the least and then you change a small amount of matter (shoot a gun through your past self) and suddenly you disappear. That's just laughable.
Time lines do not exist. Help me understand.