Written evidence refers to any documented material that supports a claim, argument, or fact. This can include items such as contracts, letters, reports, and official records. Written evidence is often used in legal contexts to establish the validity of statements or actions taken by individuals or organizations. In research and academic settings, written evidence is crucial for backing up theories and findings. It can come from various sources, including books, journal articles, and interviews. Properly citing written evidence enhances credibility and allows others to verify the information presented.