Suppose I use the luck of Mat Cauthon to pick a random direction to fly my perfect spaceship. Assuming I live forever, do I eventually end up in a world that split from this world?
No. The splitting is not in physical space (the space through which you travel in a spaceship), but in configuration space. Each point in configuration space represents a particular arrangement of fundamental particles in real space.
Moving in real space changes your position in configuration space of course, but this doesn't mean you'll eventually move out of your old branch into a new one. After all, the branches aren't static. You moving in real space is a particular aspect of the evolution of the universal wavefunction. Specifically, your branch (your ...
From Costanza's original thread (entire text):
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