How to Argue with Catholics

Introduction There are some logical fallacies that occur often enough to be given names. Some sound humorous, like “Arguing Against a Strawman” (which is when an opponent’s position is misrepresented and then attacked). Others have titles that have been distorted by pop culture, like “Begging the Question” (which refers to an argument that assumes its…

Thomistic Arguments for Christianity

Introduction Saint Thomas Aquinas is famous for his philosophical proofs for the existence of God, but proving theism does not prove Christianity. Fortunately, Aquinas did not stop there. Although they are less well-known, and sprinkled throughout several of his works, Aquinas extended his apologetic arguments to the truth of Christianity itself. In many apologetic systems (e.g., McDowell, Geisler, or Montgomery), the…

Light from Light: A Non-Heretical Analogy for the Trinity

Introduction It seems to be an unwritten rule that whenever an analogy for the Trinity is given, one must begin with the disclaimer that “all analogies break down.” The reason, though, that all analogies break down is simply because analogies compare things that are not exactly alike (if they were, it would not be an…

The Christian Faith: All or Nothing?

Introduction One of the most convicting (i.e., terrifying) theological passages I ever read had to do with lack of faith. Now, a reasonable guess as to its content would be something about the threat of Hell – maybe a Sinners In The Hands of An Angry God sort of thing. But it wasn’t. In fact,…

The Origin of “In Essentials Unity…”

“In necessariis unitas, in dubiis libertas, in omnibus caritas.” These words, translated variously as “in essentials unity, in non-essentials liberty, and in all things charity,” or, “unity in necessary things; liberty in doubtful things; charity in all things,” have often been assigned to St. Augustine and used as a sort of get-out-of-debate free card for…

Biblical Perspicuity and Linguistic Under-Determination

Biblical Perspicuity Arguments based on disagreements in biblical interpretation are often answered with an appeal to biblical perspicuity (clarity). The appeal takes many forms. One is the idea is that the Bible is clear on “the main things,” and so disagreements are no big deal because they must, by definition, be over secondary issues. Another…