You're kidding, right? I always give a straight answer. As for you, you couldn't even give me a straight answer whether "the Church" canonized the writings in the New Testament!!
Stubborn has one of the most bizarre twisted minds I've ever encountered, and it's a waste of time to debate him other than to call out his grave errors and heresies for the sake of not allowing third-party readers to be persuaded by the poison he spews. He constantly begs the question, engages in circular arguments, redefines terms to create bizarre tautologies, has absolutely no comprehension of a "distinction" or a "sylllgogism", regularly denounces all 20th century theologians, later adding all 19th century theologians into the mix when someone provided citations from them to contradict his heresies.
So, when we put out the syllogistic argument with the MAJOR premise that the "Pope cannot teach error" (oversimplified here for the sake of illustration), he'll respond with ... but the Sedevacantists claim that the Pope can teach error (since it's glued inextricably into his cold dead brain that these men had to have been Popes). When you explain that the argument is in the form
modo tollentis where, we affirm the proposition that Popes cannot teach error, and then because the V2 papal claimants did teach error, conclude they were not popes ... well, you might as well be speaking in Chinese, since the proposition that "Montini was not the pope" being a conclusion of a syllogism simply "does not compute", "does not comptue". Or he'll create tautologies. He says that Magisterium is inerrant, making you think he agrees with the SVs, but what he says is that untrue things that the papal claimants teach are not "Magisterium", and so he creates an absurd meaningless tautology, where "Magisterium" is just the TRUE things that the Popes teach, rendering it without error by tautological definition. Then he'll claim the SVs believe the Popes DID teach error, again begging the question that they are Popes, which is precisely what the SVs dispute. It's just mindboggling really.

Sadly, however, he's not kidding. We wish he were.