The ball is still in your court.
Where in scripture does it say that Mary remained a virgin?
Where in scripture does it say that Mary lived a sinless life?
Where in scripture does it say that Mary was assumed into heaven?
You're making claims about Catholicism directly contradicted by public-source Catholic documents.
A theologian from the 19th century does not speak for the Catholic Church. The Bible does not command sola Scriptura.
Where in scripture does it say that Mary remained a virgin?
Isaiah 7:14, Canticles 4:12, Luke 1:24 and 27
Every virtuous woman is a virgin before conceiving her firstborn. The Blessed Virgin has the title, because she remained a virgin despite conceiving and giving birth. Her vow of perpetual virginity, as noted in Luke 1:34, was never broken. If you take up the contrary position, you are no longer espousing Christian doctrine.
Where in scripture does it say that Mary lived a sinless life?
Canticle 5:2, Canticle 6:9, Apoc 21:1-2, 9-end
Where in scripture does it say that Mary was assumed into heaven? Canticle 6:10, Apoc 12:1, Apoc 21:1-2, 9-end
Have fun!