The Multiverse Interpretation of Quantum Mechanics interprets a quantum decision as different universes, each with each outcome. I was wondering how probability plays into this. For example, if we have some hypothetical particle that we somehow has a 60% chance of measuring spin up on, when we measure its spin, would there be a 60% probability that we are in the universe in which the measurement’s result is up, or would it be something else? Please explain.
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