In 1854, the Pope declared that Mary, the mother of Jesus, was conceived without original sin -- the Immaculate Conception.  In Catholic doctrine, original sin means the stain all humans inherit from Adam, whose first sin was disobedience.  This sin supposedly is part of the human soul from the instant of conception.  Only Mary, according to the Catholic Church, was conceived with no original sin.Popular culture, though, misunderstands the phrase Immaculate Conception to...