Single-world theories still have to compute the wavefunction, identify observers, and compute the integrated squared modulus. Then they have to pick out a single observer with probability proportional to the integral, peek ahead into the future to determine when a volume of probability amplitude will no longer strongly causally interact with that observer’s local blob, and eliminate that blob from the wavefunction. Then translating the reductionist model into experiences requires the same complexity as before.
Single universe theories dont have to be consciousness or observer dependent. Consciousness-causes-collapse , the thing that keeps getting mistaken for the Copenhagen Interpretation, is an observer dependent theory , but the same logic doesn’t have to apply in reverse. Single universe decoherence is an example of a single universe theory that isn’t observer dependent. According to decoherence low measure information is smeered out over the environment, by the normal operation of the SWE, not some additional computation.
Single universe theories dont have to be consciousness or observer dependent. Consciousness-causes-collapse , the thing that keeps getting mistaken for the Copenhagen Interpretation, is an observer dependent theory , but the same logic doesn’t have to apply in reverse. Single universe decoherence is an example of a single universe theory that isn’t observer dependent. According to decoherence low measure information is smeered out over the environment, by the normal operation of the SWE, not some additional computation.