The book "Euthydemus" (Ukrainian name "Euthydemus") is one of the dialogues of the ancient Greek philosopher Plato. In this work, the author examines the nature of true knowledge, wisdom, and rhetoric. The main idea of the dialogue is to demonstrate how a person can detect a logical flaw in the reasoning of the interlocutors who command the word. Using a dialogic form of conversation, the author shows the importance of critical thinking and understanding the essence of morality. "Eutidemus" is considered one of the important works of ancient philosophy and is part of the classical heritage.