For 10 points, name this Catholic dogma, which states that a Pope speaking of matters divinely revealed is without error.
Klaus Schatz recorded debated instances of the invocation of this doctrine, including a work of Leo I about the two natures of Christ. Statements employing this doctrine cannot later be contradicted by the Church because of the sensus fidelium, and it was used before its formal definition in the bull Ineffabilis Deus relating to the Immaculate Conception. Defined by Pius IX at the First Vatican Council, Pius XII invoked this doctrine regarding the Assumption of Mary. For 10 points, name this Catholic dogma, which states that a Pope speaking of matters divinely revealed is without error.
Klaus Schatz recorded debated instances of the invocation of this doctrine, including a work of Leo I about the two natures of Christ.
{papal infallibility}