[c1ccccc1]

I agree that's it's possible to create objective collapse theories that are arbitrarily difficult to falsify, but the difference between objective collapse and regular old decoherence due to interaction with the environment has experimentally measurable implications. In particular, if you expect a certain probability of objective collapse in a certain period of time, then do an experiment with a coherence time longer than that, while keeping your system carefully isolated from interaction with the environment. Then if the wavefunction collapses anyway, that would prove objective collapse and disprove many worlds.

[throwaway81523]

I thought an objective collapse theory was one where the observation (whatever that is) causes the collapse. An observation is necessarily an interaction with the system, where the observer is part of the environment. So if the system is that isolated from the environment, the collapse or lack of it can't be observed. I didn't think it meant the collapse happens after some amount of time like radioactive decay, even without an observation (interaction). Maybe I'm wrong.