The Everettian multiverse is a bit like seeing some bubbles and foam in the surf and concluding that there are "many oceans." Yes, there are many surfaces of w

The Everettian multiverse is a bit like seeing some bubbles and foam in the surf and concluding that there are "many oceans." Yes, there are many surfaces of water, but calling each bubble an ocean is a bit disingenuous. Like the bubble analogy, new Everettian universes are local, small, and the total amount of probability density (water in this analogy) is conserved.