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* The "hidden variable" interpretation<ref>http://www.reasons.org/resources/non-staff-papers/the-metaphysics-of-quantum-mechanics</ref> says that there is actually a [[determinism|deterministic]] way to predict where the wavefunction will collapse; we simply have not discovered it.  [[Von Neumann]] attempted to prove that there is no such way; however, [[John Stuart Bell]] pointed out an error in his proof.

* The "hidden variable" interpretation<ref>http://www.reasons.org/resources/non-staff-papers/the-metaphysics-of-quantum-mechanics</ref> says that there is actually a [[determinism|deterministic]] way to predict where the wavefunction will collapse; we simply have not discovered it.  [[Von Neumann]] attempted to prove that there is no such way; however, [[John Stuart Bell]] pointed out an error in his proof.

* The many-worlds interpretation says that each particle does show up at every possible location on its wavefunction; it simply does so in alternate universes.  Thus, myriads of alternate universes are invisibly branching off of our universe every moment.

* The many-worlds interpretation says that each particle does show up at every possible location on its wavefunction; it simply does so in alternate universes.  Thus, myriads of alternate universes are invisibly branching off of our universe every moment.

* The currently prevailing interpretation, the Copenhagen interpretation, states that the wavefunctions do ''not'' collapse until someone observes the particle in a certain state; until someone observes it, it exists in a quantum indeterminate state consisting of all possible states.  [[Schrodinger]] demonstrated this concept with [[Schrodinger's cat|his famous cat experiment]].

* The currently prevailing interpretation, the Copenhagen interpretation, states that the wavefunctions do ''not'' collapse until someone observes the particle at a certain location; until someone observes it, it exists in a quantum indeterminate state of simultaneously being everywhere in the universe.  However, [[Schrodinger]], with [[Schrodinger's cat|his famous cat experiment]], raised the obvious question: who, or what, constitutes an observer? What distinguishes an observer from the system being observed? In essence, the Copenhagen Interpretation requires a [[soul]] or something else to distinguish observers from inanimate matter.

==Applications==

==Applications==