teeboy #2
The Assumption is an infallible teaching, and I believe is the only infallible doctrine.
Corki #3
The Assumption is one of a handful of Ex Cathedra proclamations (the Immaculate Conception is another). There are quite a few infallible doctrines.
There are dogmas which are infallible, and there are doctrines which are infallible. There are doctrines which are non-infallible.
The three categories can be examined here and are summarised as:
1) Dogma – infallible (Canon #750.1) to be believed with the assent of divine and Catholic faith.
2) Doctrine – infallible (Canon #750.2) requires the assent of ecclesial faith, to be “firmly embraced and held”.
3) Doctrine – non-definitive (non-infallible) and requires intellectual assent (“loyal submission of the will and intellect”, Vatican II, *Lumen Gentium *25), not an assent of faith. [See the Explanatory Note on
Ad Tuendam Fidem by the Congregation for the Doctrine of the Faith]
ewtn.com/library/CURIA/CDFADTU.HTM
**Answer by David Gregson of EWTN on Nov-22-2002: **
“You are correct in stating that the Pope exercises his charism of infallibility not only in dogmatic definitions issued,
ex cathedra, as divinely revealed (of which there have been only two), but also in doctrines definitively proposed by him, also
ex cathedra, which would include canonizations (that they are in fact Saints, enjoying the Beatific Vision in heaven), moral teachings (such as contained in
Humanae vitae), and other doctrines he has taught as necessarily connected with truths divinely revealed, such as that priestly ordination is reserved to men. Further details on levels of certainty with which the teachings of the Magisterium (either the Pope alone, or in company with his Bishops) may be found in
Summary of Categories of Belief.”