Logical Fallacies

Oversimplified

• A logical fallacy is a flaw in reasoning — an argument whose conclusion doesn't actually follow, even when it sounds persuasive.
• Naming fallacies matters in theology because many objections to Orthodoxy are not false facts but faulty inferences; spotting the fallacy is often the whole reply.

Summary

Logical fallacies are recurring errors in the form of an argument, distinct from errors of fact. A claim can be false; an argument can be invalid — and an invalid argument proves nothing even if its premises happen to be true. This entry is a working reference for the fallacies that most often surface in apologetic exchanges, so that a discussion can be moved from rhetoric back to reasoning. Cross-link Presuppositionalism, The Transcendental Argument, The Right to Private Judgment.

Fallacies that recur in theological debate

• Begging the question (petitio principii). Assuming the very point in dispute — e.g. "Scripture is the sole authority, because Scripture is the highest authority." The conclusion is smuggled into the premise. (See Sola Scriptura.)
• Equivocation. Sliding between two senses of a word mid-argument — e.g. "faith" as intellectual assent versus faithful trust, or "church" as invisible-elect versus visible body. (See Invisible vs Visible Church.)
• Special pleading. Applying a standard to the opponent while exempting oneself — e.g. demanding explicit early attestation for icon-veneration while granting the biblical canon, which lacks equally explicit early attestation. (See Icons, Sacred Tradition.)
• False dilemma. Presenting two options as exhaustive when more exist — e.g. "either the bread is only a symbol or it is cannibalism," ignoring real sacramental participation. (See Eucharist.)
• Genetic fallacy. Judging a claim by its origin rather than its truth — e.g. "that practice has a pagan parallel, therefore it is pagan." (See Haloes.)
• Anachronism / presentism. Reading a later category back into an earlier text — e.g. expecting fully articulated fourth-century Trinitarian vocabulary in the second century, then calling its absence disproof.
• Ad hominem. Attacking the person rather than the argument.
• Straw man. Refuting a distorted, weaker version of the opponent's actual position.

Why this belongs in theology

Charitable apologetics aims to answer the strongest form of an objection (the opposite of a straw man) and to diagnose why a mistaken claim feels compelling. Often the underlying error is not a false fact but a hidden fallacy — a buried premise, an equivocation, a smuggled assumption. Naming it is not a debating trick; it clears the ground so the real question can be seen. Cross-link Presuppositionalism, The Transcendental Argument.