Here is what Vatican I says about Papal Infallibility:
when the Roman pontiff speaks EX CATHEDRA, that is, when,
1 - in the exercise of his office as shepherd and teacher of all Christians,
2 - in virtue of his supreme apostolic authority,
3 - he defines a doctrine concerning faith or morals to be held by the whole church,
he possesses, by the divine assistance promised to him in blessed Peter, that infallibility which the divine Redeemer willed his church to enjoy in defining doctrine concerning faith or morals.
Therefore, such definitions of the Roman pontiff are of themselves, and not by the consent of the church, irreformable.
With this in mind, I have the following questions:
1 - What does #1 and #2 tangibly mean? Assuming it was on faith or morals, which of the following from the pope would be considered infallible?
-When the pope uses the words “Ex Cathedra”
-Proclamations at an Ecumenical Council
-Proclamation at a local council
-Statements at weekly audiences
-Statements at misc teaching engagements
-Statements at misc public appearances (i.e. while traveling and visiting other countries)
-Private confessional counseling
2 - After following the criteria from above, if one runs into seemingly contradictory statements, how do we know which one is correct?
3 - How do we know if a doctrine is held by the whole church? Who interprets this?
4 - What does it actually mean to “define doctrine”?
5 - Is there an easy way to know exactly what is infallible? If so, what is it? If not, why is the doctrine of papal infallibility meaningful?