What type of fallacy is demonstrated when someone argues that no evidence proves something is true, therefore it must be false?

The type of fallacy demonstrated in this argument is known as the Appeal to Ignorance. This fallacy occurs when someone asserts that a lack of evidence for a proposition is taken as proof that the proposition is false, or conversely, that a lack of evidence against a proposition supports its truth. In this case, stating that no evidence proves something is true implies that it must be false, which is not a logically sound conclusion.

Appeals to ignorance exploit the absence of evidence instead of providing substantive proof or logical reasoning. This can mislead audiences by suggesting that the burden of proof lies solely on those making a claim, when in reality, all parties should ideally present their arguments supported by evidence. Recognizing this fallacy is crucial for evaluating the strength and validity of arguments in debates and discussions.