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Given Hardy's "excess baggage" theorem showing that the size of the ontic state space must scale exponentially with the number of systems, does this necessarily pose any "threat" to the ontic approach to QM? Leifer writes:
http://mattleifer.info/wordpress/wp-content/uploads/2008/10/quanta-pbr.pdf
Is the quantum state real? A review of ψ-ontology theoremsIf the quantum state truly exists in reality, it is puzzling that we cannot detect all of this extra information. Hardy has coined the term "ontological excess baggage" to refer to this phenomenon. It seems that ψ-ontologists are attributing a lot more information to the state of reality than required to explain our observations.
http://mattleifer.info/wordpress/wp-content/uploads/2008/10/quanta-pbr.pdf