I liked this discussion but I’ve reread the text a few times now, and I don’t think this fictional Outcome Pump can be sampling from the quantum wavefunction. The post gives examples that work with classical randomness, and not so much with quantum randomness. Most strikingly:
… maybe a powerful enough Outcome Pump has aliens coincidentally showing up in the neighborhood at exactly that moment.
The aliens coincidentally showing up in the neighborhood is a surprise to the user of the Outcome Pump, but not to the aliens who have been traveling for a thousand years to coincidentally arrive at this exact moment. They could be from the future, but the story allows time rewinding, not time travel. It’s not sampling from the user’s prior, because the user didn’t even consider the gas main blowing up.
I think the simplest answer consistent with the text is that the Outcome Pump is magic, and sampling from what the user’s prior “should be”, given their observations.
I liked this discussion but I’ve reread the text a few times now, and I don’t think this fictional Outcome Pump can be sampling from the quantum wavefunction. The post gives examples that work with classical randomness, and not so much with quantum randomness. Most strikingly:
The aliens coincidentally showing up in the neighborhood is a surprise to the user of the Outcome Pump, but not to the aliens who have been traveling for a thousand years to coincidentally arrive at this exact moment. They could be from the future, but the story allows time rewinding, not time travel. It’s not sampling from the user’s prior, because the user didn’t even consider the gas main blowing up.
I think the simplest answer consistent with the text is that the Outcome Pump is magic, and sampling from what the user’s prior “should be”, given their observations.