What is the focus of the logical flaw known as "Appeal to Ignorance"?

The logical flaw known as "Appeal to Ignorance" focuses on the premise that a claim is considered true simply because it has not yet been proven false. This fallacy rests on the assumption that a lack of evidence against a claim serves as a foundation for its acceptance, neglecting the necessity for affirmative evidence supporting the claim itself. In essence, rather than presenting substantiated facts to validate an assertion, it relies on the absence of counter-evidence, which is an unsound basis for determining truth. This error in reasoning can be misleading and can divert attention from more robust logical arguments that require proper evidence to establish their validity.