Houston, We Have a Problem! It is the Solemn AND the Universal Ordinary Magisterium of the Church that is Infallible. And the Teaching of the Chair of Peter is Unblemished. Vatican I is Clear on these Points.
Sola Ex Cathedra is every bit as much a heresy as Sola Scriptura
1.) Sola Ex Cathedra (Popes are only infallible when making
an ex cathedra definition) is a heresy of semi-Trads.
2.) Sola Scriptura (only the Bible is infallible) is a heresy of Protestants.
If the Popes could at times teach heresy, how would we know when they are teaching truth or error? We would have to be the superior of the Pope to decide when he is teaching the truth and when he is teaching falsehood…that is a complete prideful delusion!
OBJECTION # 1:Vatican I said the Pope is only infallible when speaking Ex Cathedra
ANSWER # 1: While it is true that Ex Cathedra statements are infallible; it is absolutely NOT true that Ex Cathedra statements are the ONLY times Popes are infallible. Vatican I infallibly declares: