Francis Claud Cockburn was a British journalist. His saying "believe nothing until it has been officially denied" is widely quoted in journalistic studies, but he did not claim credit for originating

Mikhail Efimovich Koltsov, born Moisey Haimovich Fridlyand, was a Soviet journalist, revolutionary and NKVD agent. He served as the editor-in-chief of the satirical magazine, Krokodil.