False Purpose Fallacy

A fallacy and bias where two or more oppressive or repressive systems, institutions, or practices are treated as fundamentally incomparable solely because of their stated or intended purpose, despite producing identical or functionally equivalent harms. The fallacy lies in substituting intent for impact, purpose for consequence. When someone argues that CECOT prison in El Salvador "doesn't compare" to Sednaya prison in Syria because one is for "rehabilitation" (or "fighting gangs") while the other was for political repression, they commit the False Purpose Fallacy—as if the experience of the prisoner, the deprivation of liberty, the violence of the state, and the suffering of the confined were somehow different because the official justification differs. Similarly, when Western AI surveillance is distinguished from authoritarian surveillance because "we're protecting democracy" while "they're controlling dissent," the same fallacy operates: the purpose stated differs, but the surveillance functions similarly. The fallacy is false because purpose does not negate parallel function; good intentions do not transform oppressive machinery into something else; stated goals do not alter lived experience.

Example: "He insisted CECOT wasn't comparable to Sednaya because El Salvador was 'fighting gangs' while Syria was 'crushing dissent'—pure False Purpose Fallacy, as if prisoners experience their cages differently based on the press releases justifying their imprisonment."

False Purpose Fallacy by Dumu The Void March 13, 2026