Appeal to Falsifiability

A fallacy where someone argues that because a claim cannot be proven false, it must therefore be false. This inverts the proper use of falsifiability, which is a criterion for scientific status, not a test for falsehood. The fallacy typically appears in debates about religion, spirituality, or metaphysics: "You can't prove God doesn't exist, so God must not exist." But the same logic would prove anything unfalsifiable false—a absurd consequence. The fallacy confuses burden of proof (claims need evidence) with falsifiability as a truth test. Unfalsifiable claims aren't automatically false—they're just not empirically testable. Their truth or falsehood must be evaluated by other standards.

Appeal to Falsifiability - "You can't prove it's false, ergo it must be false" "I mentioned my belief in consciousness beyond the brain. Response: 'You can't prove it's false, so it must be false.' That's Appeal to Falsifiability—demanding disproof as proof of falsehood. By that logic, you can't prove invisible unicorns don't exist, so they must exist. The fallacy works both ways, which is why it's a fallacy."

Appeal to Falsifiability by Dumu The Void February 28, 2026