That’s the problem though. What some others are saying is that “legally” and objectively Benedict XVI is a heretic (apostate really) so his resignation was never valid because he was never Pope.
I don’t agree with my Sedevacantist brothers and sisters on the vacant see because I am “R&R,” but honestly, I don’t see how this type of argument would work to prove your point.
Intention is what matters when it comes to a resignation. There is no “form” because it is not a sacrament. Benedict has repeatedly said and affirmed that Francis is Pope and that he fully resigned without any mental or actual reservations.
Besides who would carry out the investigation? The even more heretical cardinals and bishops who love Francis?
I don't believe that any of the Vll "Popes" had valid conclaves because Cardinal Siri was elected Pope in 1958 and remained true Pope with the grace of the office until his death in 1987. All of the invalid conclaves in between
elected(?) invalid anti-popes. The first potentially valid conclave after Siri's death was Benedict XVI in 2005. I'm only raising it as a possibility since Benedict was actually ordained a priest in the old rite in the late 60's and there still might have been enough valid Bishops at that conclave to actually elect a Pope- not sure. Also the seat was legitimately empty during that conclave.
The back story to this is that in the late 1800's freemasons put forward fellow freemason and liberal Giovanni Ferretti who was elected Pope Pius lX. It was a VALID conclave. Apparently the Pope DID receive the grace of the office and did a complete turnaround; becoming a a truly traditional Pope who did not put forth the freemasonic agenda. (Vatican l was during Pius lX reign)
The freemasons (Jєωs) realized that they could never move forward with the destruction of the Church by infiltration of the Papacy with a legitimately elected Pope . There had to be a real Pope to receive the grace of the office that could be put aside, while the illegitimate antipope could carry out the demolition of the Church with impunity. Siri was the true Pope put aside for the "reigns" of the anti-popes JohnXXlll, Paul Vl, JPl and JPll.
So, although I am no fan of Ratzinger with his Vll German liberalism ( I think that one of his 60's books actually denied the Resurrection) I am not so sure that he did not have a valid conclave. And if he was actually elected, the same trick was applied to him (once his pontificate proved negative to TPTB) as was applied to Siri. They had to put aside a legitimate Pope with the grace of the office, in order to install an illegitimate antipope to continue the destruction.
I'm just putting this out as another variation of the Siri /Ratzinger theory.
PS- Yes I know that Siri said the anti-popes were the real popes and all that jazz. I never said he had any courage. Obviously not.