No Original Research

"No Original Research" means that information added to a source like Wikipedia must be based on already published, reliable sources. It prevents people from including personal ideas, unpublished experiments, or new theories. This rule ensures that content is verifiable and trustworthy, relying on existing evidence rather than individual interpretations or unpublished work. In essence, it promotes accuracy, neutrality, and credibility by only incorporating information that has been independently confirmed and published elsewhere.