As I've pilosophized about many-worlds there is one thing I've recently come to believe is that there is a slight issue with his answer 7: We as people don't exist in a single world. Rather we have a certain non-zero "width" if you will in "probability-space". This would mean that "the fire" is already a little bit distributed based on what we can observe.
This follows from heisenberg uncertainty. If a world is an assignment of a position to every particle, it cannot also assign them momentum: If you see position as fundamental then momentum is a phenomenon that exists "between-worlds" rather than inside them. And conversely if you see momentum as fundamental than position exists "between-worlds". When such fundemental things cannot exist in a single world, than I doubt that we can either.
What if neither position nor momentum are fundamental, though (which, as I understand it, is the “default” for the math behind QM)? According to my understanding of the uncertainty principle, neither of them have values until their values are collapsed (whether it be through many worlds, pilot wave theory, or what have you).
This follows from heisenberg uncertainty. If a world is an assignment of a position to every particle, it cannot also assign them momentum: If you see position as fundamental then momentum is a phenomenon that exists "between-worlds" rather than inside them. And conversely if you see momentum as fundamental than position exists "between-worlds". When such fundemental things cannot exist in a single world, than I doubt that we can either.