Source Criticism

Source criticism (Quellenkritik) is the foundational procedure of the historical discipline, by which a scholar interrogates a source before treating any of its statements as evidence. Codified in the nineteenth century by Ernst Bernheim and by Charles-Victor Langlois and Charles Seignobos, and rooted in Ranke's insistence on examining documents at first hand, the method divides into two complementary operations. External (or lower) criticism establishes whether a source is what it purports to be: its authenticity, the integrity of its text, its author, place, and date. Internal (or higher) criticism then asks what the source means and how far its assertions can be trusted, weighing the author's competence, sincerity, proximity to events, and interests. Only after both passes does the historian compare independent sources and synthesize a defensible account. The discipline of the method lies precisely in its refusal to take any testimony at face value.