@article{Freundlich1978CopenhagenismAP,
title={Copenhagenism and Popperism*},
author={Y. Freundlich},
journal={The British Journal for the Philosophy of Science},
year={1978},
volume={29},
pages={145 - 177}
}

There seems to be an unbridgeable gap between rival interpretations of quantum mechanics. One school speaks of the quantum state vector (and hence of the associated probabilities) as a property of individual quantum systems; another school insists that the quantum state vector is an ensemble property and that the associated probabilities refer to statistical distributions within the ensemble. The former school asserts that an observable of a system has a value in that system if and only if the… Expand