I'm asking this to Ladislaus because he seems to be the most educated person around here who subscribes to sedeprivationism, but anyone is welcome to respond.
I have been hearing for several years now that Bp. Guerard des Lauriers only believed his theory applied to people closer to the time when we had a true pope, and would not accept the current theory that Francis is a material pope. The reasoning I heard is that he thought the cardinals appointed by a true pope (let's say up to and including John 23) could provide a valid election to the papacy, but that a material pope actually doesn't have the power to create cardinals with a valid elective power, which only a true pope is able to do. Thus, Paul 6 was elected by real cardinals, but by the time JP2 was elected, probably a lot of the real cardinals appointed by real pope were not involved in the election anymore, so the election of JP2 was not valid. Thus, none of the supposed cardinals today have the power to elect a true pope.
I have heard this explanation (or a similar one) various times, but I haven't been able to track down whether des Lauriers actually thought this, or whether it's just another myth. Anyone know anything about this?