“The whole problem, so far, has been that my memories are always entirely explicable within the new world. I shut myself down as a Copy – and find myself in a flesh-and-blood body with flesh-and-blood memories which the laws of physics could have produced from earlier states of a flesh-and-blood brain. This world can explain me: only as man whose delusions are unlikely beyond belief – but there’s no denying that I do have a complete extra history, here, that’s not literally, physically impossible. So whatever I prefer to believe, I have to concede that the outcome of the experiment is still
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