Fallacy of Impossible Rationality

The practice of demanding that an opponent's reasoning be free of any and all cognitive bias, emotional influence, or cultural perspective before it can be considered valid. It sets an unattainable standard of "pure reason" that no human has ever achieved, then uses the inevitable failure to meet it as grounds for dismissal. This fallacy is common among those who have just discovered that biases exist and now use that discovery to disqualify any argument they disagree with. "You only believe that because of confirmation bias" becomes a conversation-ender, as if having a bias automatically makes a claim false, and as if the speaker themselves were miraculously bias-free.

Example: "He dismissed every study I cited with 'that's just your Western rationality'—a Fallacy of Impossible Rationality pretending that because perfect objectivity doesn't exist, all reasoning is equally worthless."

by Dumu The Void March 11, 2026

Fallacy of Impossible Reason

A close cousin to impossible rationality, this fallacy demands that an opponent's reasoning process be flawless, complete, and self-contained according to an impossibly strict standard before it can be engaged with. It's the "gotcha" of pointing out that an argument has unstated premises, that it relies on some assumptions, or that it isn't mathematically formalized—as if any human communication could meet such standards. The fallacy lies in using the inevitable gaps and imperfections in all reasoning as an excuse to reject the reasoning entirely, rather than engaging with its substance. It turns the legitimate observation that "no argument is perfect" into the illegitimate conclusion that "therefore no argument is worthwhile."

Example: "He demanded I write my position as a series of formal logical propositions with every premise explicitly stated—a Fallacy of Impossible Reason designed to make conversation so tedious I'd just give up."

by Dumu The Void March 11, 2026

Fallacy

A mistaken belief.

Hym "I mean, the level of fallacy being espoused is ridiculous. Fallacy means literally 'that you are mistaken in believing that the words that you are saying is consistent with the conclusion you are drawing' and, therefore, aren't justified in saying it or acting on the conclusion. Fallacy = Retarded."

by Hym Iam January 4, 2026

fryan fallacy

The Fryan Fallacy is when you don't know what you're talking about and link the first thing you find on google that you think supports your opinion, but it outright refutes it.

Your own source debunked your own claim. You just committed the Fryan Fallacy.

by JimmyJimJimmm January 16, 2019

Toyu Fallacy

An opponent predicts exactly what you would say, but refuses to, or can't explain why you are wrong. This is an anti argument because the opponent isn't making a point nor debunking yours.

Joseph Joestar knew DIO would say "kono dio da", however, that does not change the fact that DIO can rock his shit.

During a debate about the wage gap, a leftist says to a right wingerin retaliation to an argument they made: haha why did I somehow know that you would say that "the study only compares two checks between a man and a woman. It does not not take the other factors into account, such as hours worked, efficiency of the product, etc". That means that you're wrong because I knew you would say that. They used the Toyu Fallacy

by nigkamatsu July 18, 2019

Sakkorafas Fallacy

A fallacy people often engage in when attempting to debate someone of superior intellect. It is the presupposition that sakkorafas has the capacity of holding a non ideal position

Eg. Sakkorafa diafwnw

The person questioning the validity of sakkorafas' claim has failed to comprehend that sakkorafas making a mistake cannot be characterized as something that belongs in the realm of possibilities due to foxness

Oh man nathan's fallacy meter started going off after a globetard attempted to debate mr sakkorafas, the sheer ignorance of globies these days is fascinating they are just constantly sakkorafas fallacying

by Zuck Markerberg March 2, 2020

Phallusy Fallacy

When a man wrongly believes that his penis is much larger than is actually is, he is living.

I was with this guy last night who listed "well endowed" on his Tinder profile. Maybe if he was comparing it to his pinkie finger. Girl, that dude is experiencing a phallusy fallacy.

by keywest4life March 10, 2020