The Evertian Multiverse Is Testable

We occupy only one universe and it is impossible to know which universe you'll be in ahead of time. Only by doing the experiment do you find out. Some assert that consciousness is involved instead that an observer collapses the wave function they say. The Evertian multiverse is testable. See David's explanation of this in Paul Davies book The Ghost in the Atom or for more on testability see on the logic of experimental tests particularly of Evertian quantum theory.