How would you know if we are on a timeline where intervention from the future has changed the past? In our timeline, it hasn't changed.
That is: The original timeline is timeline A. Travelers from the future come back, intervene, and the result is timeline B. But to those on timeline B, nothing has changed - it just looks the way timeline B always looked.
(Unless the intervention is blatant - people show up in a flying saucer and use death rays to assassinate Hitler before he becomes Chancellor, say...)
yeah I'm thinking about it in the way that is assumed by the original author, with the idea that visitors from the future would be somehow identifiable.
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How would you know if we are on a timeline where intervention from the future has changed the past? In our timeline, it hasn't changed.
That is: The original timeline is timeline A. Travelers from the future come back, intervene, and the result is timeline B. But to those on timeline B, nothing has changed - it just looks the way timeline B always looked.
(Unless the intervention is blatant - people show up in a flying saucer and use death rays to assassinate Hitler before he becomes Chancellor, say...)
yeah I'm thinking about it in the way that is assumed by the original author, with the idea that visitors from the future would be somehow identifiable.