How do Catholic square the dogma of the "Immaculate Conception" with the concept that Mary could have said "no"?
Excellent point...But I don't think you're going to get many bites on that one...
Mary who came into being without Original Sin, had the same spiritual status as Eve, who came into being without Original Sin.
Sh could have subsequently sinned of her own volition, just as Eve ended up doing.
But she chose not to sin. She chose to cooperate with God in all things.
But please don't ping me to any more of this brawl. IMVVHO, it doesn't require intellectual combat so much as exorcism.
It's amazing how Catholics can't even see the double speak.