Please study your Latin:
**A term meaning “of Faith,” used to identify those doctrines of the Church which are infallibly true. Their infallible certitude derives ultimately from divine revelation, but proximately from the fact that they have either been solemnly defined by the Church’s magisterium or have been taught by her ordinary universal teaching authority as binding on the consciences of all the faithful.**
De fide means “of faith”
My response was:
Faith alone
Scripture alone
Grace alone
Through Christ alone
Glory to God alone
Magesterium or ex-cathedra statements being equivalent to Scripture? Deuteronomy 4:2, Psalm 119:160, Proverbs 30:6, 1 Corinthians 4:6, Revelation 22:19.