qnli question: What consequences did he believe that this would have on Mary's reputation ? sentence: The celebrated John Duns Scotus (d. 1308), a Friar Minor like Saint Bonaventure, argued, on the contrary, that from a rational point of view it was certainly as little derogatory to the merits of Christ to assert that Mary was by him preserved from all taint of sin, as to say that she first contracted it and then was delivered.