The document discusses the theory and history of documentaries. It notes that documentaries aim to report on facts and events using techniques like narration, interviews, and observations. While documentaries strive for objectivity, they are also inherently subjective as filmmakers interpret and construct reality. The genre has evolved over time, ranging from Grierson's initial documentaries in the 1930s to more creative modern forms that some argue should no longer be called documentaries. Facts are used to make socially critical arguments, but documentaries still grapple with objectively representing truth.