Representatives of the United States Conference of Catholic Bishops, the Presbyterian Church-USA, the Christian Reformed Church in North America, the Reformed Church in America, and the United Church of Christ have signed an agreement formally pledging to recognize one another’s baptisms when water and the Trinitarian formula are used. In 1948, the Holy Office declared that “baptism conferred in the sects of the Disciples of Christ, the Presbyterians, Congregationalists, Baptists, [and] Methodists” is “presumed as valid unless in a particular case it is proven to the contrary,” as long as “the necessary matter and form have been used.” In 1993,...