A standard Protestant argument (and the one that seems to be the most popular on social media) against the Catholic doctrine of Mary's sinlessness is rooted in the alleged fact that Sacred Scripture teaches that all human beings have sinned:
[A]ll have sinned and fall short of the glory of God (Romans 3:23).
Now, since Mary is a human being, it follows that Mary is a sinner. Apparently, then, the argument for Mary being a sinner is as follows:
- For any x, if x is human, then x is a sinner.
- Mary is human.
- Therefore, Mary is a sinner.
