> Thanks! This is like undoing historical events. If you forget about the > fact that dinosaurs ever lived on Earth and there is an alternative > history > that led to your existence in the multiverse, and you do the memory > erasure > also in sectors were dinosaurs never lived, you have some nonzero > probability of finding yourself on an Earth were the dinosaurs never > lived.
The problem I'm having with this line of reasoning is that "memory" isn't a fixed physical object. Memory is reconstructive, and depends upon emotional triggers both at the time when the memory was encoded and at the time when it re-examined in the conscious mind. No memories are particularly accurate. Most of the time, I'm not aware that dinosaurs existed because I'm not thinking about it, or any other part of Earth's history, for that matter...but I don't seem to have the experience that my environment is impoverished of history altogether just because I hadn't been thinking hard enough about it. As another example, people who have false recovered memories through psychotherapy invariably end up unable to confirm them when they look for facts to back up their new memories, and that happens in my universe even though I personally don't have any information to confirm or deny their memories. In other words, I don't see why forgetting something is any more likely to change events than simply being wrong about having the memory in the first place, the latter of which happens constantly. If you want to argue about what nonzero probability implies, you'd have a hard time showing that anything non-contradictory at all has a nonzero probability of being true. :) > Because of the entanglement, I don't think you can, in general, reverse > the spin > state of the particle without reversing what is known about it by "the > rest of > the world". The rest of the world? What's that? Anna --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to everything-l...@googlegroups.com To unsubscribe from this group, send email to everything-list+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/everything-list?hl=en -~----------~----~----~----~------~----~------~--~---