One of the most popular objections to sola Scriptura among Catholic epologists is the allegation that sola Scriptura is a “blueprint for chaos.” The Protestant rule of faith has generated “33,000” mutually contradictory Protestant denominations–or so goes the argument
However, this objection poses a dilemma for the Catholic epologist. If these are mutually contradictory denominations, then in what sense are they all “Protestant”? You can’t very well classify them under the same rubric unless all “33,000” denominations share a core identity.
So the very objection to Protestant diversity tacitly assumes that all Protestant denominations have a common denominator. They must have something essentially in common that makes all of them “Protestant.”
So the Catholic epologist needs to begin with his general definition of “Protestant.” If, however, there’s a general definition of “Protestant,” then whatever diversity there exists among Protestant denominations can only be measured against the benchmark of their fundamental unity as “Protestant” denominations.