Biblical a priori
The a priori order of the typical orthodox Reformed theological system rests on the testimony of God to his own existence—on a biblical a priori—and not on the ability of the theologian to argue the existence of God.
Richard A. Muller, Post-Reformation Reformed Dogmatics: The Rise and Development of Reformed Orthodoxy; Volume 3: The Divine Essence and Attributes (Grand Rapids, MI: Baker Academic, 2003), 185.