John Duns Scotus (1266 AD to 1308 AD) was a Franciscan theologian and philosopher. He founded the school of thought known as Scotism. He developed a proof of the existence of God and advocated the doctrine of Immaculate Conception<ref>http://www.newadvent.org/cathen/05194a.htm </ref>. | John Duns Scotus (1266 AD to 1308 AD) was a Franciscan theologian and philosopher. He founded the school of thought known as Scotism. He developed a proof of the existence of God and advocated the doctrine of Immaculate Conception<ref>http://www.newadvent.org/cathen/05194a.htm </ref>. |