From the Fundamentals of Catholic Dogma:
With regard to the doctrinal teaching of the Church it must be well noted that not all the assertions of the Teaching Authority of the Church on questions of Faith and morals are infallible and consequently irrevocable. Only those are infallible which emanate from General Councils representing the whole episcopate, and the Papal Decisions Ex Cathedra (cf. D 1839). The ordinary and usual form of the Papal teaching activity is not infallible. Further, the decisions of the Roman Congregations (Holy Office, Bible Commission) are not infallible. Nevertheless normally they are to be accepted with an inner assent which is based on the high supernatural authority of the Holy See (assensus internus supernaturalis, assensus religiosus). The so-called “silentium obsequiosum.” that is “reverent silence,” does not generally suffice. By way of exception, the obligation of inner agreement may cease if a competent expert, after a renewed scientific investigation of all grounds, arrives at the positive conviction that the decision rests on an error.
Code:
Unfortunately Fundamentals of Catholic Dogma is not infallible. There is no Church teaching that says,
“The ordinary and usual form of the Papal teaching activity is not infallible”
That is Ott’s personal opinion. Again, if all Catholics must assent in mind and will to ordinary teachings and an ordinary teaching was wrong, then the whole Church would be wrong, and that is impossible. Or Jesus would be requiring all Christians to believe false teaching, and that would be impossible also.
The whole book “Fundamentals of Catholic Dogma” is based based on an error, that is, on false assertion that the writings of the Fathers and the writings of scripture are “proof” of Church teachings.
This is false. They are only the witness to Church teachings, not the source and proof of Church teachings. One cannot prove what is handed in Tradition by writings, because by definition, Tradition is not written.
Just as I cannot “prove” by writings that I learned the name of clouds, grass, etc, from my parents. My parents never wrote down these when they taught these things. But, since I was raised only by them, then that is proof enough I learned these things from them, even though there are no writings.
Since the apostles learned directly from Jesus, and they were not scholars before, then all they taught beyond the basics of what they knew as Jews had to come from Jesus. Jesus publicly chose them to learn His Gospel. Thus, the teachings that they handed down in Tradition come from God, though there are no explicit writings to prove each and every doctrine. Thus no one can prove Church teachings by writings of the Fathers of the Church and by scripture. The Church seldom says scripture is a proof of some teaching and the most the Church ever says is the WITNESS of scripture is proof of a teaching.