..but our results are certainly not an immediate consequence of MSOP.
Thanks so much for all these comments!
Yes, our explanation is pretty much in line with "Reacquisition is rapid when animals have learned that reinforced trials signal other reinforced trials", i.e., p(US|US) is high. Rapid reacquisition results from an intact retrospective memory and a high prior of p(US) coming from p(US|US),...
...seemingly encoded in and controlled by OFC.
...animals with no behavioral relearning, dopamine cue response is learned equally fast in reacquisition as acquisition, which is again hard to square away with conditioned inhibition.