We could (if we could travel fast enough) witness event B then travel to before event A using FTL to stop the birth/kill them and therefore prevent event B (according to the posters explanation). Let’s say said person did some terrible event at point B (which we “observe” first), then we view event A after (the birth of the person). To illustrate this let’s use the last diagram but change it slightly. What this means is that, at best we can only ever observe past events, we cannot interact with them, influence them or change them. So my first question here is, is my understanding here correct or not?Īssume I am correct with the above. So essentially we viewed these events out of order…but they STILL OCCURRED in the correct order of a,b,c. But imo this is not time travel, the same events occurred in the correct order (A then B then C), it’s just that due to said object (the person or ship) traveling faster than light we OBSERVED event B first. In the last diagram he gives an example of us seeing someone or some event BEFORE they were born, then later seeing them born (read the whole thing first to get the context). The best way to demonstrate my point is with an example so let’s expand on the great explanation already provided by the last poster from the link above (you don't need to read all answers just the last one right at the bottom by Andrew Steane). However, from what I take away from these explanations is that it only “appears” as though (as in “observed”) backwards time travel was achieved, to me this not true time travel (or what my definition is of it). ![]() I am going to reference this question here and the answers proposed, I will build on them and their examples.Įvery explanation so far I’ve read (inc link above) about backwards time travel always hinges on the speed of light, light cones and that you must travel faster than light to achieve it. They key phrase here is “interacting with it” as in somehow change it or influence the future. I think what most non-scientific people (me) believe backward time travel is, is what we see in the movies – that is you can travel backwards in time to specific timeline and interact with it, potentially changing the course of some events. I think where I might be getting it wrong (if I am) is my perception of what time travel is so let me clear that up first. ![]() I understand moving forward in time easily, it’s the backwards in time I don’t get I just don’t think it is possible, even in theory. I know this question has been asked before and I have read and understand the answers however imo none of them still imply that backward time travel is possible.
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