* The Roman Catholic teaching that Mary the mother of Jesus was supernaturally prevented from being tainted by original sin so that she could give birth to Jesus as God’s own Son. The teaching was first suggested by the theologian Duns Scotus in the thirteenth century and declared to official Roman Catholic Dogma (authoritative teaching) by Pope Pius IX in 1854
*Stanley J. Grenz, David Guretzki & Cherith Fee Nordling, Pocket Dictionary of Theological Terms (Downers Grove, IL: InterVarsity Press, 1999), p. 63
Mary was a sinful person just as we all are! Nowhere in the Bible does it say anything about her remaining sinless.