Peter D. Williams, a British Catholic apologist and Director of the Family Education Trust, dives into the complexities of biblical canon and tradition. He critiques the Protestant doctrine of Sola Scriptura, arguing it lacks the historical context and authority needed for a fuller understanding of Scripture. The discussion highlights the distinction between divine knowledge and religious canons, emphasizing the importance of tradition in recognizing sacred texts. Williams challenges Protestant claims regarding infallibility, advocating for a more humble and nuanced approach to faith and knowledge.