Can You Outsmart the Argument from Ignorance Fallacy?

Elizabeth Cox builds this essay around Dorothy Kenyon and the paranoia of McCarthyism to explain a simple but destructive mistake: treating a claim as credible because it has not yet been disproven. The article is really about burden of proof. An accusation does not become serious merely because it is frightening, repeated, or hard to refute on demand.

The historical case gives the fallacy its teeth. Senator Joseph McCarthy claimed communist infiltration inside the U.S. government and named Kenyon as someone tied to communist fronts. Some of the cited organizations reportedly did not even exist, yet the accusation still forced her into a defensive posture. That is exactly why the fallacy matters. When the alleged wrongdoing is secret or vague, the accused can be trapped in an impossible task: every denial looks self-serving, and the absence of instant disproof is treated as suspicious. Cox's point is that this reverses the direction of rational argument. The claimant must supply the evidence; everyone else is not obliged to disprove a speculative charge.

What stays with the reader is the political danger of this reasoning style. Fear makes weak claims feel weighty, and institutions can legitimize those claims simply by entertaining them. Worth keeping from this essay: whenever someone says "you can't prove it didn't happen," that is usually a sign that evidence is missing, not that guilt is quietly accumulating.