For the canon lawyers: What does "papal infallibility" mean in the case of Pope John XXII?
Roberto de Mattei has written a study of Pope John XXII, who, he says, according to St. Robert Bellarmine (in De Romano Pontifice, Opera omnia, Venetiis 1599, Book. IV, chap. 14, coll. 841-844), fell into heresy in his ordinary magisterium (with the intention of imposing it as truth on the faithful) but was saved from undermining the principle of infallibility by dying before he could define the dogma. [Advisory: See Rules 7-9]