[dartuser]

Through him she was spared from original sin so that she could be a holy abode for the infant, Jesus, growing within her.

If Mary had to be sinless so Jesus "could have a holy abode," then Mary's mother had to be sinless for the same reason. If Mary didn't have a holy abode she would have been stained by her mothers sin. And her grandmother, and great-grandmother ... and so on and so forth ...

By induction, Eve was sinless ...

Any fifth grade math student sees the contradiction ...

[Salvation]

With God, all things are possible.