Testis unus, testis nullius

“Testis unus, testis nullius” is a Latin phrase commonly used in the legal field. It means “one witness is no witness” and emphasizes the idea that the testimony of a single witness is unreliable and insufficient to establish the truth. This principle is particularly important in legal matters where the credibility and reliability of evidence is crucial, and it highlights the need for multiple witnesses or additional evidence to support claims or accusations.