Now, I am devoted to Our Mother…she brought me into the Church and I dedicated my son to her and I pray for her intercession for them and for me as a mother every day. However, I fail to see how this issue refutes Catholicism as a whole. Many “I make my own rules” Christians like to argue these points endlessly, as if the whole of the Church rotated on a minor issue. Also, as addressed above, you cannot argue with someone if you don’t start with the same given. If this person conveniently ignores 2000 years of well-established Oral Tradition, but it’s central to your argument then Mary’s assumption is not your issue. Sola Scriptura is your issue.