I'm not sure if there's any way to get you to understand this, but I'll try one more time. You would not have to believe that what these putative Conciliar popes have done cannot violate the Church's indefectibility ... IF YOU DON'T BELIEVE THEY ARE POPES.
Every time you post, you simply assume that they are Popes.
Let's try a simple example ...
MAJOR: Dogs cannot walk upright on two legs.
MINOR: This animal walks upright on two legs.
CONCLUSION: This animal is not a dog.
This is an argument in the form referred to as modus tollens or modo tollentis.
MAJOR: IF P, THEN Q.
MINOR: NOT Q.
CONCLUSION: THEN NOT P.
This is the SV argument.
MAJOR: Legitimate Popes cannot teach grave error to the Universal Church or promulgate a Mass that's offensive to God and harmful to souls.
MINOR: Montini (aka "Pope" Paul VI) taught grave error to the Universal Church and promulgated a Mass that's offensive to God and harmful to souls.
CONCLUSION: Montini was not a legitimate pope.
I'm not interested in debating the details, since that's precisely what the SV vs. R&R debate is about ... but here I'm simply trying to explain that in the SV framework, the Popes have not taught error or promulgated a harmful / offensive Mass ... BECAUSE THEY ARE NOT POPES.
For whatever reason, this most basic of logical arguments doesn't not sink through into your skull, and it's really not that hard.
First, I do not assume they are popes, I believe they are popes - why? because that is the Catholic default position. This default position, among other things, is based on reality.
I already know the sedes believe that
"the Popes have not taught error or promulgated a harmful / offensive Mass ... BECAUSE THEY ARE NOT POPES." Everybody knows this. They believe this even though their starting (and ending) point, i.e. the MAJOR, is wrong. IOW, their opinion-turned-doctrine is based on a false premise per the Council of Constantinople. This false premise is the sede default position.
I'm now waiting for you to start calling both Pope Agatho and Pope Leo II old catholic heretics and condemn the whole Third Council of Constantinople while you're at it.
Pope Honorius I Pope (625-12 October, 638), a Campanian, consecrated 27 October (Duchesne) or 3 November (Jaffé, Mann), in succession to Boniface V.
His chief notoriety has come to him from the fact that he was condemned as a heretic by the sixth general council (680)