Fallacy of Arbitrary Factuality

The error of declaring certain claims to be facts and others to be false based on nothing but personal preference or tribal allegiance, ignoring evidence, expertise, and consistency. This fallacy is how someone can believe that vaccines are dangerous despite overwhelming scientific consensus, or that an election was stolen despite dozens of court cases and audits. Facts become a la carte: you pick what's true based on what feels good, what your team believes, or what serves your interests. The fallacy of arbitrary factuality is the death of shared reality, because if facts are just whatever you want them to be, then we're not having a conversation—we're just yelling at each other from different dimensions.

Example: "She committed the fallacy of arbitrary factuality in the group chat, declaring that a viral TikTok was 'facts' while dismissing a peer-reviewed study as 'just someone's opinion.' When asked why, she said the study 'felt wrong' and the TikTok 'felt right.' Facts, for her, were feelings, and reality was whatever she felt like believing."

by Dumu The Void February 15, 2026

Fallacy of Impossible Induction

The mistaken belief that because complete induction (examining every case) is impossible, no inductive conclusion can be trusted. This fallacy rejects all generalizations on the grounds that we haven't examined every instance—ignoring that induction works by sampling, not census. It's the logic of "you haven't read every book, so you can't say books exist," of "you haven't met every French person, so you can't generalize about French culture." The fallacy of impossible induction is beloved of those who want to dismiss well-supported generalizations by demanding impossible standards of proof. It's a cousin of the perfect knowledge fallacy, and just as paralyzing.

Fallacy of Impossible Induction Example: "She cited studies showing the benefits of exercise. He responded with the fallacy of impossible induction: 'But you haven't studied every person who ever exercised. How do you know it works for everyone?' She said science doesn't require studying everyone; it requires representative samples. He said that wasn't proof. She said that was how proof works. He remained unconvinced, which was his right, but also his loss."

by Abzugal Nammugal Enkigal February 17, 2026

Fallacy of Exhaustive Induction

The mistaken belief that only exhaustive induction—examining every possible case—can establish truth. This fallacy rejects all probabilistic, statistical, or sampling-based reasoning as insufficient, demanding certainty that is rarely available and never necessary. It's the logic of "you can't prove all swans are white until you've seen every swan," ignoring that science doesn't prove in that sense. The fallacy of exhaustive induction is the mirror image of the fallacy of impossible induction: both set impossible standards, one by rejecting induction entirely, the other by demanding a form of induction that's rarely possible. Together, they form a pincer movement against any empirical claim.

Fallacy of Exhaustive Induction Example: "He demanded exhaustive proof that climate change was real: 'Have you measured every temperature reading everywhere on Earth for the last hundred years?' No, because that's impossible. But you don't need exhaustive proof; you need representative proof. He demanded the impossible and therefore rejected the possible. The fallacy had done its work: blocking belief with an unmeetable standard."

by Abzugal Nammugal Enkigal February 17, 2026

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

Fallacy of Perfect Consistency

The logical fallacy of demanding that an opponent be perfectly consistent in everything they say or do—across contexts, over time, in every statement—while exempting oneself or one's own side from any such scrutiny. The fallacy ignores that human beings are complex, that contexts change, that learning involves changing one's mind, and that perfect consistency is impossible for any real person or movement. It's the logic of "you said X five years ago, so you can't say Y now," of "your actions don't perfectly match your words, so your words are invalid." The Fallacy of Perfect Consistency is beloved of those who want to dismiss opponents without engaging their current arguments, who would rather dig up old contradictions than address present claims. The cure is recognizing that consistency is not a binary state but a spectrum, and that growth, learning, and context all produce apparent contradictions that are actually signs of life.

Example: "He found a tweet she'd written ten years ago, before she'd studied the issue, before she'd changed her mind. 'Aha!' he declared. 'Inconsistency! Your current views are invalid!' The Fallacy of Perfect Consistency had done its work: avoiding engagement with her current arguments by appealing to her past self. She'd learned, grown, evolved—but to him, that was weakness, not strength."

by Dumu The Void February 20, 2026

Fallacy of Absolute Deprivation (also "Communism Killed Millions" Fallacy)

A form of fallacy that cites the absolute number of deaths attributed to communist regimes—typically the Soviet Union, China, or Cambodia—as an argument against any form of socialism or communist thought, while ignoring context, comparative analysis, or the question of what those numbers actually mean. The fallacy works by presenting large numbers as self-evident condemnation, as if the scale alone settled the matter. It ignores that all modern states have killed millions—colonialism, capitalism, imperialism, democracy—and that the question is not whether atrocities occurred but what caused them, whether they were inherent to the system or contingent, and what the alternatives were. The Fallacy of Absolute Deprivation is beloved of cold warriors and those who prefer moral simplicity to historical complexity. It reduces genocide to a statistic and uses that statistic to foreclose thought.

Fallacy of Absolute Deprivation (also "Communism Killed Millions" Fallacy) Example: "He ended every discussion of socialism with the same numbers: 'Stalin killed millions. Mao killed millions. Pol Pot killed millions.' The Fallacy of Absolute Deprivation meant he never had to engage with arguments about healthcare, wages, or working conditions. The numbers did all his work for him—never mind context, never mind comparison, never mind that capitalism had killed its millions too. Absolute numbers, absolutely weaponized."

by Dumu The Void February 20, 2026