I was wondering if someone could answer this question:
How can the Pope speak “ex cathedra” if there are multiple popes presiding? I understand that there have been (in the history of the catholic church) 35 times when there was more than one pope in office. When that happens, which one is the vicar of Christ, and which one is phony?
Also, I was wondering why, if the pope is truly infallible, that it came about that Pope Honorius I was condemned for teaching heresy by the Sixth Genera Council? How could a pope teach error?