The book "Sophist" is a philosophical dialogue of the ancient Greek thinker Plato, in which the question of the nature of knowledge and language is considered. The dialogue takes place between Socrates and two sophists, who present different views on the truth and ways to achieve it. The author considers the concepts of truth, language and beliefs, teaches the reader to distinguish between real knowledge and quackery. "The Sophist" remains relevant to this day and prompts the reader to think deeply about the nature of reality and our perception of it.