William Whitaker (1547-1595) was a Protestant theologian whose magisterial defense of Sola Scriptura against the Catholics remains surprisingly relevant today. Whitacker's argument is divided in six I. The Number of Canonical Books of Scripture II. The Authentic Edition of The Scriptures III. The Authority of Scripture IV. The Perspicuity of Scripture V. The Interpretation of Scripture VI. The Perfection of Scripture, Against Human Traditions