"...there is one problem: nobody knows when the Pope is speaking infallibly, nobody knows how often a pope has spoken infallibly, and nobody knows what the criteria are for when a pope is speaking infallibly.
...different Roman Catholic apologists believe differently about how many times a Pope has spoken infallibly...there is no “official” list of criteria with which it may be determined that a papal statement is infallible....Roman apologists do not even agree on the occasions that would induce a Pope to exercise the charism of infallibility...All they know is that he has it."
Timothy F. Kauffman, White Horse Blog, "INFALLIBILITY’S FATAL FLAW"
...different Roman Catholic apologists believe differently about how many times a Pope has spoken infallibly...there is no “official” list of criteria with which it may be determined that a papal statement is infallible....Roman apologists do not even agree on the occasions that would induce a Pope to exercise the charism of infallibility...All they know is that he has it."
Timothy F. Kauffman, White Horse Blog, "INFALLIBILITY’S FATAL FLAW"