I choose not to play your game. I actually AM free to do that, you know.
The problem with applying YOPIOS to the assumed assumption of Mary is that there has to be Scripture in order to have your own personal interpretation.
There is no need to answer him/her Catholics don’t accept Sola Scriptura, our Church rests on Tradition, Scripture and Magisterium. There have been plenty of threads which show our belief also and we know this person has read them because they post on almost all of them.