When does a universe split? The relativity of simultaneity causes problems: one observer will have to interpret the universe as splitting in one way and then the other, while another will observe the opposite ordering.<p>My personal favorite interpretation is the relational interpretation [1], where we just stop asking nonsensical questions about the universe. It does away with problematic notions that arise from our biases as human beings.<p>[1] <a href="http:&#x2F;&#x2F;plato.stanford.edu&#x2F;entries&#x2F;qm-relational&#x2F;" rel="nofollow">http:&#x2F;&#x2F;plato.stanford.edu&#x2F;entries&#x2F;qm-relational&#x2F;</a>