M ar 2 00 7 Quantum Foundations : Is Probability Ontological ?

It is argued that the Copenhagen Interpretation of Quantum Mechanics , founded ontologically on the concept of probability, may be questionable in view of the fact that within Probability Theory itself the ontological status of the concept of probability has always been, and is still under discussion. Two long unresolved-and in fact, seldom considered-issues have for long accompanied modern Probability Theory. The first one we shall only mention as an example of how fundamental aspects can be-and in fact, are-overlooked. The second one, which has not been completely overlooked, has nevertheless found itself side lined for longer, even if it has obvious major implications in Quantum Foundations. As for the more general background on the various, and often severely conflicting views and interpretation of the basic concepts or methods of Probability Theory, a recent survey can be found in [1].