Vermigli's Eucharistic views were accepted in Zürich, but he ran into controversy over his doctrine of double predestination. Similarly to John Calvin, Vermigli believed that in some way God wills the damnation of those not chosen for salvation. Vermigli attempted to avoid confrontation over the issue, but Bibliander began to openly attack him in 1557, at one point allegedly challenging him to a duel with a double-edged axe. Bibliander held the Erasmian view that God only predestines that those who believe in him will be saved, not the salvation of any individual. Reformed theologians during this time held a variety of beliefs about predestination, and Bullinger's position is ambiguous, but they agreed that God sovereignly and unconditionally chooses whom to save. They believed salvation is not based on any characteristic of a person, including their faith. Bullinger and the Zürich church did not necessarily agree with Vermigli's double predestinarian view, but Bibliander's view was deemed unallowable. He was dismissed in 1560, in part to assure other Reformed churches of the Zürich church's orthodoxy. Vermigli was involved in predestinarian controversy again when Zanchi, who had remained in Strasbourg when Vermigli left for Zürich, was accused of heretical teachings on the Eucharist and predestination by the Lutheran Johann Marbach. Vermigli was selected to write the official judgement of the Zürich church on the matter in a statement signed by Bullinger and other leaders December1561. His affirmation of a strong doctrine of predestination represented the opinion of the Zürich church as a whole.