Consider the classical case of Alice flipping a coin, letting it fall into a box without looking at it, then closing the box. Alice can assign probabilities of 50% it is heads and 50% it is tails. Then Alice opens the box and sees heads. She can now assign a probability of 100% heads for the entire time it was in the box. The same logic applies to phi*psi. It can be used to generate probabilities for arriving at different detectors. But once we detect it at one detector, we know it was in the associated phi*psi the entire time. What would you suggest for terminology?
I’ll look at the paper you referenced.
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