I want to know the answer to the following question:
John did not regard the loss of Duchy as a permanent shift in what?
All the background I'm provided with is that "Ideally, this plan would benefit from the opening of a second front on Philip's eastern frontiers with Flanders and Boulogne – effectively a re-creation of Richard's old strategy of applying pressure from Germany.". Is that enough to answer the question?
Answer: no