Fallacy of Exhaustive Logic

The mistaken belief that only exhaustive logical analysis—examining every possible inference, anticipating every objection, proving every step—can establish truth. This fallacy rejects any reasoning that falls short of logical perfection, demanding standards that are impossible to meet and therefore never satisfied. The Fallacy of Exhaustive Logic is beloved of those who want to dismiss arguments without engaging them, who can always find one more logical step that hasn't been explicitly justified. It's the logic of "you haven't considered every possibility, so your conclusion is premature"—a standard that, if applied consistently, would halt all reasoning forever.

Example: "She presented a well-reasoned argument for her proposal. He responded with the Fallacy of Exhaustive Logic: 'But you haven't considered every possible objection. What about X? What about Y? What about Z?' Each was addressed, and he found another. Exhaustive logic was impossible; therefore, her argument was never good enough. The fallacy had done its work: preventing decision through infinite demand."

by Dumu The Void February 18, 2026

Fallacy of Exhaustive Rationality

The mistaken belief that only perfectly rational beings—free from emotion, bias, and human limitation—can make valid judgments. This fallacy rejects all human reasoning as insufficiently rational, demanding standards that no human can meet. The Fallacy of Exhaustive Rationality is beloved of those who want to dismiss perspectives they dislike—women are too emotional, minorities are too biased, the poor are too desperate—while exempting themselves from similar scrutiny. It's the logic of "you're not being rational, so your view doesn't count," applied selectively to silence opponents while ignoring one's own irrationality. The cure is recognizing that rationality is not a binary state but a spectrum, and that all humans—including the accuser—operate with bias, emotion, and limitation.

Example: "He dismissed her concerns about workplace discrimination as 'emotional, not rational.' The Fallacy of Exhaustive Rationality had been deployed: her experience was invalid because it wasn't delivered with perfect objectivity. Never mind that his own views were shaped by unexamined bias; exhaustive rationality was demanded of her, not him. The double standard was the point."

by Dumu The Void February 18, 2026