Q: If God were all-seeing and all-knowing, the double-slit experiment wouldn’t work, would it? Wouldn’t God’s observation of the location of the photon collapse its probability wave function?

Q: If God were all-seeing and all-knowing, the double-slit experiment wouldn’t work, would it? Wouldn’t God’s observation of the location of the photon collapse its probability wave function?

A better thought experiment (and one which gets closer to explaining the answer to the question) is “Schrödinger’s Graduate Student”. Repeat the cat in a box experiment, but this time Schrödinger finds that, overcome by quantum grief, he cannot bring himself to open the box. Instead, he goes out for tea or something and has a graduate student complete the experiment for him. But, since Prof. Schrödinger hasn’t observed the graduate student yet, from his perspective the cat and student are still in a super-position of states. So, say there’s a God, and say that he/she/it/they/we observes every quantum event.

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