Like the double slit experiment with a photon, or the semi-transparent mirror?
Simple: it goes both ways. Then decoherence happens, the universe splits in half, and we experience being in either one of those halves. What we observe is but a glimpse of what actually happen. We don't have access to the other side (split universes don't communicate with each other, contrary to what much sci-fi material describes).
That may sound weird, but the alternative (that half the amplitude is "not real", or that it "collapses" (in a way that is non-local, that is, exceeds the speed of light), is even weirder.
Or you could just refuse to answer the question, and stick to "this equations mean I should observe this with those statistics".
Simple: it goes both ways. Then decoherence happens, the universe splits in half, and we experience being in either one of those halves. What we observe is but a glimpse of what actually happen. We don't have access to the other side (split universes don't communicate with each other, contrary to what much sci-fi material describes).
That may sound weird, but the alternative (that half the amplitude is "not real", or that it "collapses" (in a way that is non-local, that is, exceeds the speed of light), is even weirder.
Or you could just refuse to answer the question, and stick to "this equations mean I should observe this with those statistics".