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As long as you don't forget that Andromeda galaxy is cca. 2.5million light years away, then there should be no paradox at all. The observers are only seeing different slices of history that took place 2.5million years ago (plus/minus 1day), the decisions has already been made long time ago. It's like when you take a newspaper from a pile, more recent papers ...


Addressing delayed choice (focusing on quantum phenomena): My simplified view is that setup of the apparatus (and other devices on the path) limits possible properties and paths of photons that may reach it, but, the photon (travelling @ c), makes the whole journey from emission to absorption (detection, collapse) in the very definition of an instant, even ...

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