Evidence gapThe missing piece was not in the record.
You may need evidence that directly addresses the denied element—such as a relevant medical record, opinion, service record, or competent statement.
Research next: Supplemental Claim and the “new and relevant” evidence standard.
Existing-record errorThe answer was already in VA's record.
The decision may have overlooked evidence, relied on a wrong fact, applied the wrong rule, or depended on inadequate development.
Research next: Higher-Level Review or an appropriate Board review option.