„There are five essential elements to defamation: (1) The accusation is false; and (2) it impeaches the subject’s character; and (3) it is published to a third person; and (4) it damages the reputation of the subject; and (5) that the accusation is done intentionally or with fault such as wanton disregard of facts.”
Roger LeRoy Miller, Gaylord A. Jentz, Business Law Today: The Essentials, Cengage Learning, 2007, p. 115. „In other words, making a negative statement about another person is not defamation unless the statement is false and represents something as a fact (for example, 'Vladik cheats on his taxes’) rather than a personal opinion (for example, 'Vladik is a jerk’).”
Michael G. Parkinson, L. Marie Parkinson, Law for advertising, broadcasting, journalism, and public relations, Routledge, 2006, p. 273. „Simplifying a very complicated decision, the court said that because the plaintiff must prove a statement is false in order to win an action in defamation, it is impossible to win an action in defamation if the statement, by its very nature, cannot be proven false.”