There is one thing I don't understand about this concept, can someone explain?
From what I understand, the idea is that under some proposed models of reality, a probabilistic event occurring causes the world to split into versions where both of the outcomes happened, and as a consequence of this, if a probabilistic event involves someone's death, their consciousness will always be preserved in the world where the event didn't happen, because it cannot exist in the other one.
The problem I see here is that the splitting is supposed to occur at the same time as the event, but no event can cause death instantaneously. There is a time delay. So wouldn't it be, that even assuming this model of physics is true, consciousness would be able to exist in both versions of reality, just that in one of them it would be destroyed a second later, at which point, that occurring is already set in stone since the probabilistic event that will cause this has already happened? I think the result of this would be that the actual likelihood of death is still exactly the same as in a world that doesn't split due to these events.