[cersei]

This is more metaphysical than scientific (but could have a multidimensional scientific basis)... I had a near death (or perhaps actual death) experience as a child where my life flashed by, however it was ever so slightly different from the life I knew (in a butterfly effect kind of way), which then prevented me from dying. It felt as if history had changed or my consciousness joined a parallel timeline where I was still alive. What made me think this way is that I seemed to have retained memories from the original past and not the current one, them being mostly similar events, but in slight differences in timing & order (which ended up making a big difference for me). I of course always tried to assess if this was some form of psychosis or error (assuming that to be the case), but I seemed to know a variation of real events that had not been shared with me (due to the timing differences, e.g. something happening before my birth rather than after it).

Anyway, as a fun thought experiment... If your near death experience was indeed history rewriting itself ever so slightly, and even if you retained memories from it, would you be able to tell? You can't be fully certain that all of the people share exactly the same history the way you remember it (and you'd be likely to dismiss yours as an erroneous memory.)