Yes, Settled Dogma. At least in the eyes of the Catholic Church.
BTW:
I have read the Bible. I have read the entire St. Joseph version of the New Testament in High School during my Junior year. We read the Bible as well the Catholic Churches interpretation of the bible and how all the Churches Sacraments and Dogmatic teachings are all Biblically based.
It was part of the religious instruction at the Catholic High School I attended and EVERY pupil Catholic or non Catholic was required to do so and receive Catholic instruction.
I don’t recall everything I was taught. Suffice to say that they had answers to any question you could ever come up with. It is simply up to you to accept it or deny it. They can not force you to believe.
The reason why reading the Bible is insufficient is because the Bible is often confusing and even seemingly contradictory. Why do you think there are so many biblically based Protestant religions? If their was only one interpretation, why so many different churches?
The one thing in common with all Protestant religions is that they are not Catholic.
I first learned that Jesus had brothers and sisters in a Bible study class taught by a CATHOLIC PRIEST. I was very fortunate and blessed to be taught by priest who taught the Bible as it is written and did not make things up. Here are some other facts:
1) There is NO mention in the Bible that Mary herself was conceived of an immaculate conception. This is something made up out whole cloth.
2) There is NO mention that Mary was ALWAYS a virgin. She was married to Joseph and other children followed Jesus, including James. This IS mentioned in the Bible.
3) There is ABSOLUTELY NOTHING in the Bible requiring celibacy as a precondition for service in the priesthood. In point of fact, priests in the Bible were married men with children as were the early popes, bishops, and priests well into the Middle Ages.
A genuine religion is based upon the historical record. The Judeo-Christian tradition is based upon historical events-—real people who actually lived in defined places at certain times in history.
When you start making things up out of whole cloth, such a religion then begins to resemble the mythology akin to the ancient Roman, Greek, and Egyptian religions.
Better to stick with the Bible and the historical record than to make things up.