In the past, I there was a period of 3 years or so between popes. I believe it was just before Pope Gregory the Great, but I could be wrong. During that time of no pope, new bishops were consecrated without papal approval and were assigned roles. When the new pope was elected, he approved the consecrations and said the church did the right thing. When no pope is present. Jurisdiction comes from Holy Mother Church.I am curious as to know your answer to this question:
•Where are the bishops with ordinary jurisdiction?
I am asking this because according to pre-Vatican II theology, the Church must always have living bishops who have ordinary jurisdiction without interregnum in order to continue possessing the mark of Apostolicity. And pope Pius XII had already declared that the ordinary jurisdiction of bishops come directly from the Roman Pontiff.
So I am curious as to how you would answer this because most sedevacantists online end up denying that there are living bishops today with ordinary jurisdiction. And this denial, frankly, is a post-Vatican II rationalization and, at worst, plausibly heretical in pre-Vatican II standards.
Yes, pre-Vatican II theologians entertained the possibility that the pope might lose his office because of heresy, but they never entertained the notion that all the bishops with ordinary jurisdiction would become heretics at the same time because this idea is detrimental to one of the four marks of the Church: apostolicity.
Many sedevacantists turn to the principle of epikeia which essentially states that laws are for the benefit of the people and that a law that ceases to benefit the people becomes invalid. Therefore, according to them, a law that says a Catholic bishop needs something that is impossible for him to get (due to a lack of pope), that law becomes invalid otherwise the church will end.