The difference is not in the prediction of what we see. MWI and Collapse postulates come out tied on that.
It’s what they say goes on ‘behind the curtain’. Collapse postulates say that there’s nothing behind the curtain. WMI says that the dynamics are much simpler and more like the rest of physics if there are things behind the curtain.
The problem with that is that MWI and Copenhagen do NOT have the same exact complexity. Copenhagen adds a mechanism of exceedingly high complexity. ‘Applying the Born Rule’ adds nothing to MWI as in that case it’s just an approximation—the universe doesn’t care. But with Copenhagen, it’s REAL, and it’s gotta be implemented somehow, in a way that violates all those core elements of physics that Eliezer listed so neatly.
Moreover, we should be used to the notion of stuff existing behind the curtain—stuff we can never ever see. We’ll never see photons that have been radiated away from us. Objects have insides, and there’s no theoretically viable way of doing elemental analysis on any given cubic meter of the Earth’s core, let alone cubic millimeter. Same goes for the sun, but more so. And all the other stars in the universe, even more so.
The notion that there are yet more things we can’t ever ever measure really shouldn’t be foreign.
The difference is not in the prediction of what we see. MWI and Collapse postulates come out tied on that.
It’s what they say goes on ‘behind the curtain’. Collapse postulates say that there’s nothing behind the curtain. WMI says that the dynamics are much simpler and more like the rest of physics if there are things behind the curtain.
Which is simpler?
No point arguing about unquantifiable notions, so here I attempt to quanitfy “simpler”.
The problem with that is that MWI and Copenhagen do NOT have the same exact complexity. Copenhagen adds a mechanism of exceedingly high complexity. ‘Applying the Born Rule’ adds nothing to MWI as in that case it’s just an approximation—the universe doesn’t care. But with Copenhagen, it’s REAL, and it’s gotta be implemented somehow, in a way that violates all those core elements of physics that Eliezer listed so neatly.
Moreover, we should be used to the notion of stuff existing behind the curtain—stuff we can never ever see. We’ll never see photons that have been radiated away from us. Objects have insides, and there’s no theoretically viable way of doing elemental analysis on any given cubic meter of the Earth’s core, let alone cubic millimeter. Same goes for the sun, but more so. And all the other stars in the universe, even more so.
The notion that there are yet more things we can’t ever ever measure really shouldn’t be foreign.
Never say never! A near miss of the photon sphere of a black hole can send it back.
Your point still stands.