The main idea of time travel is simple. Realize a problem, go back in time to stop it, and voila! The human resistance against autonomous cyborgs becomes inexistent.
Trying to understand the science behind time travel, however, is asking for a headache especially when compounded with the paradox problem. For example, what if a man receives plans for a time machine from a stranger, fixes the continuum for his benefit, and goes back in time to tell his past self about it? Under this scenario, who really invented the time machine? Continue reading