Perfect example. This is indeed a truth testified to by Tradition. It was revealed, but not in Scripture. At least not explicitly.
This is another example of RC "magic". Revelation ceased with the Apostles but some was "hidden" until it was needed or until we were able to "understand".
Such "hidden" revelation as:
Papal Infalibility.
Perpetual Virginity.
Bodily Assumption.
And.....more to come.
Way back in the late 1940's it was "revealed" to me that my Church was preparing the way for the "revelation" of the co-equal status of Mary with Jesus.
The fact that Pope John Paul II has been quoted as saying Saint Louis Marie de Montfort’s book 'True Devotion to the Blessed Virgin Mary' is the most important book he has ever read is confirmation that my "revelation" was on target.
No matter how many times you're told, you still lie. Even if Mary were named "co-redeemer," that would not entail any sense of "equality" with Jesus.
Why do you lie on purpose?
SD