[BipolarBob]

"So there is no direct reference to Mary having sinned. Why, then, do you believe this is so?
Why is Mary’s sin not documented?"

Now you're going all Dan Brown on me with this. I'm supposed to prove a negative. No thanks. Lots of people in the Bible do not have their sins documented. Proves nothing. The burden of proof is on YOU.

[JCBreckenridge]

Your argument is from silence. You have no direct evidence that Mary sinned.