Whether a federal appellate court may reverse an administrative agency's decision on a factual ground not addressed by the agency, without a remand to that agency, consistent with the Administrative Procedure Act and the principles of separation of powers

QUESTION PRESENTED May a federal appellate court, consistent with the Administrative Procedure Act and the principles of separation of powers embedded within that Act, reverse an administrative agency’s decision on a factual ground not addressed by the agency, without a remand to that agency?