Plenus Venter: did you ever read the True Story of the vatican Council, by Cardinal Manning. The Infallibility dogma was brought forward for all the 300 years of misinterpretations and the years of Luther. It was a mess. It was thought, Holy Ghost will protect pope/church. But the word "might" was used in the 1hour and a half of reading/defining at Vatican I. Might the pope take his divine office, might he ask for the Holy Ghost, might he. For if he decides not to, he can lose his authority. Example: Did Pope Pius XI consecrate Russia, as God commanded through Our Lady in 1929. No, he did not. Hm? That is serious. Did he lose his authority?
It is noted: That Our Lady told Lucia at TUY, Spain, 1929, that the hour was now, to do the consecration. Then it is said, that Our Lady said, Pope Pius XI did not consecrate, half measure. He will be like King Louis who was asked to consecrate France. He did not, he lost his throne and was beheaded.
Pope can lose authority, and did the church lose her head. yes, she did.