Argumentum Ad Sanitatem

A logical fallacy where one dismisses an argument by claiming the opponent needs psychological or psychiatric help, rather than engaging with the substance of their position. The fallacy lies in treating mental health status as a refutation of claims, as if being in psychological distress automatically invalidates what someone says. "You need help" becomes a conversation-ender, a way of dismissing uncomfortable ideas by pathologizing the person who holds them. This fallacy is particularly insidious because it weaponizes genuine mental health concerns—using the stigma surrounding psychological distress to silence dissent, avoid difficult conversations, and position oneself as the sane, reasonable party without actually addressing any arguments. It's argument by diagnosis, not by reason.

Example: "When she raised legitimate concerns about workplace conditions, her manager didn't address a single point—just said 'you need psychiatric help.' Argumentum Ad Sanitatem: using the language of mental health to avoid engaging with substance."

by Dumu The Void March 16, 2026

Argumentum Ad Intelligentiam

A logical fallacy where one dismisses an argument by attacking the opponent's intelligence, typically with variations of "you're stupid." The fallacy lies in treating IQ as a proxy for correctness, as if being less intelligent automatically makes someone wrong about a particular claim. "You're too dumb to understand" becomes a way of avoiding engagement, a preemptive dismissal that requires no evidence and addresses no substance. This fallacy is the lazy debater's favorite: rather than explain why a position is wrong, simply assert that only stupid people would hold it, thereby positioning oneself as intelligent without demonstrating any actual intelligence through reasoned argument.

Example: "He couldn't explain why her economic analysis was flawed, so he just called her stupid. Argumentum Ad Intelligentiam: when you can't win the argument, attack the arguer's IQ."

by Dumu The Void March 16, 2026

Argumentum Ad Cognitionem

A logical fallacy where one dismisses an argument by claiming the opponent is delusional, cognitively impaired, or using ableist slurs to describe their mental state. The fallacy lies in treating cognitive capacity as a refutation of claims, as if being confused or mistaken in some areas invalidates everything someone says. This fallacy is particularly toxic because it weaponizes genuine cognitive differences and disabilities, using them as cudgels to dismiss dissent. "You're delusional" becomes a way of saying "I don't need to engage with your points" while performing the appearance of having refuted them. It's argument by ableism, not by reason.

Example: "She presented documented evidence of corruption, and his response was simply 'you're delusional.' Argumentum Ad Cognitionem: using accusations of cognitive failure to avoid confronting uncomfortable facts."

by Dumu The Void March 16, 2026

Argumentum Ad Responsabilitatem

A form of Miranda Bias where one shifts responsibility for an argument, claim, or situation onto the opponent, typically by demanding they take responsibility for something they didn't cause or can't control. The fallacy lies in misplacing accountability—treating the person pointing out a problem as responsible for solving it, or the person documenting harm as responsible for preventing it. "If you're so concerned, why don't you do something about it?" becomes a way of deflecting criticism without addressing it. This fallacy allows those with power to avoid accountability by shifting attention to those without power, demanding that critics solve the problems they merely identify.

Example: "When she documented the environmental damage, the company responded with 'if you care so much, why don't you clean it up?' Argumentum Ad Responsabilitatem: blaming the messenger for the message."

by Dumu The Void March 16, 2026

Argumentum Ad Reum

A form of Miranda Bias where one treats the person making an argument as if they were the defendant on trial, demanding they prove their innocence or justify their right to speak. The fallacy lies in reversing the burden of proof—placing the person raising a concern in the position of having to defend themselves rather than the position they're criticizing. "What gives you the right to complain?" becomes a way of avoiding the complaint entirely. This fallacy is common in power-laden contexts where questioning authority is treated as itself an offense requiring justification.

Example: "He questioned the policy, and instead of addressing his points, they demanded he prove he wasn't just bitter about a personal grudge. Argumentum Ad Reum: treating the questioner as the defendant."

by Dumu The Void March 16, 2026

Argumentum Ad Objectitatem

A form of Objectivity Bias where one invokes "objectivity" as a magic wand to dismiss opposing views without engaging them. The fallacy lies in claiming that one's own position is simply objective reality while the opponent's is biased, ideological, or subjective—without demonstrating why this is so. "You're not being objective" becomes a conversation-ender, a way of positioning oneself as the neutral arbiter of truth while dismissing all alternatives as merely perspectival. This fallacy allows the speaker to claim the mantle of objectivity without actually doing the work of demonstrating why their view deserves that label.

Example: "He didn't argue against her interpretation—he just said she wasn't being objective, as if his own view was simply reality itself. Argumentum Ad Objectitatem: using the claim of neutrality to justify taking sides."

by Dumu The Void March 16, 2026

Argumentum Ad Veritatem

A form of Truth Bias where one invokes "truth" as a self-justifying warrant for their position, treating their claims as simply what's true and therefore beyond challenge. The fallacy lies in using the concept of truth to immunize one's views from examination—"I'm just telling the truth" becomes a way of saying "I don't need to argue, because what I say is simply reality." This fallacy shuts down inquiry rather than advancing it, positioning the speaker as the conduit of truth and all opponents as either deceived or deceivers. It's argument by assertion of virtue, not by evidence or reason.

Example: "She responded to every question with 'I'm just telling the truth'—as if saying it made it so. Argumentum Ad Veritatem: using the word 'truth' to avoid having to demonstrate it."

by Dumu The Void March 16, 2026