The Fallacy of the Catholic Argument from Doctrinal Division
The Roman Catholic challenge—“So which of the many different doctrines of non-Catholic churches is the truth? All claim to be true but differ from others! Can’t all be true if they differ!”—is a logically flawed, theologically inconsistent, and self-defeating argument. It assumes that the mere existence of doctrinal disagreement within Protestantism invalidates Protestantism itself. However, by this same standard, Roman Catholicism would also be invalidated since it has its own significant doctrinal divisions.