Quantum Probability: Conditioning and Inference

R. Scozzafava.

Looking at conditional probability from the right perspective allows one to avoid classic paradoxical aspects of quantum mechanics. We discuss, as an elementary analogue of quantum states, a classical example (an urn of unknown composition) with similar (putative) paradoxical situations, despite the fact that there is no quantum effect to which they could be ascribed. A crucial feature is that we look at them from an epistemic point of view and not from the viewpoint of a (seemingly) ontological reality.

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