Talk:World Line Convergence/@comment-28963345-20160710033433/@comment-34262424-20180524045836

As a concept, it serves to answer the Grandfather Paradox. Take for instance, Back to the Future, if he erases his own existence by preventing his own birth, then he would not have gone back in time in the first place, so how would he have gne back to prevent his birth? Doesn't make sense, right? Now take it when you have a purpose. If you go back to kill Hitler, then you grow up and are raised never knowing Hitler and the awful atrocities committed under him, so why would you go back to killing Hitler? That is convergence. Because Okabe time leaps to save Mayuri, he is on the same worldline, so him trying to prevent the reason he jumped back is a paradox, and the worldline converges to preserve causality. However, because D-mails shift the worldline and are therefore originating from outside the worldline and are never sent in the new world, the issue of causality is resolved.