Time Travelling
Time travel is one of the most attractive things which may happen not only in science fiction novels or films but also may take place in reality according to David Lewis, a prominent American philosopher of the 20th Century. His daring mind led him to one of the most logically consistent ideas of his generation. “Time travel, I maintain, is possible. The paradox of time travel are oddities, not impossibilities”. To explain David Lewis’s view of casual loops we should touch upon such a notion as Causal Reversals that leads to the possibility of Causal Loops. According to Dr.Alasdair Richmond’s video lectures on coursera.org, there are two types of time: external and personal. Causal reversals become possible when the orders of these kinds of time disagree. It means that in cases of travelling back in time, personal time continues to progress from earlier stages to later ones while external time progresses in its own direction as well. Thus, we may travel back in time an