For 10 points, who said that "plurality should not be posited without necessity," thus creating his namesake "razor?"
His Ordinatio, a commentary on Book I of Lombard's Sentences, was denounced by former chancellor John Lutterll. He fled with Bonagratia and Michael of Cesena to Pisa under the protection of Louis IV, because he was persecuted for defending Franciscan poverty and right of kings to tax the church in Opus nonaginta dierum. A student of Duns Scotus, he was the leading nominalist and became known as "Doctor Invincibilis." For 10 points, who said that "plurality should not be posited without necessity," thus creating his namesake "razor?"
His Ordinatio, a commentary on Book I of Lombard's Sentences, was denounced by former chancellor John Lutterll.
William of {Ockham}