Perfect Logic Fallacy

The demanding that arguments must have perfect, error-free logic to be considered valid or worthy of consideration. The fallacy lies in setting an impossible standard that no real argument meets, then using inevitable imperfections to dismiss otherwise sound reasoning. In practice, all arguments have some flaws—ambiguities, leaps, unstated assumptions. Perfect Logic Fallacy uses this inevitable imperfection as a reason to reject engagement entirely. It's the logical version of "no one's perfect, so everyone's worthless."

"I spent hours crafting a careful argument. Response: 'Your third premise has a minor ambiguity—therefore your whole argument fails.' That's Perfect Logic Fallacy—demanding flawless logic that no actual argument possesses. Arguments are judged by overall strength, not perfect purity. Demanding perfection is a way of refusing to engage."

by Dumu The Void February 28, 2026