Quantum mechanics forces us to reconsider certain aspects of classicalcausality. The 'central mystery' of quantum mechanics manifests in differentways, depending on the interpretation. This mystery can be formulated as thepossibility of selecting part of the initial conditions of the Universe'retroactively'. This talk aims to show that there is a global, timeless,'bird's view' of the spacetime, which makes this mystery more reasonable. Wewill review some well-known quantum effects from the perspective of globalconsistency.
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