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torekp comments on Quotes and Notes on Scott Aaronson’s "The Ghost in the Quantum Turing Machine" - Less Wrong Discussion
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I think one can also justify talk of backward causality along the lines of what Scott says on p. 23:
If we are considering actions A and B now, and these correspond to microscopically different past facts X and Y, and there is no other route to knowledge of X or Y, it seems reasonable to agree with Scott that we are "selecting one past".