The "socratic" method which had the task detection of "truth" by conversation, dispute, polemics was a source of idealistic "dialectics". "Understood as dialectics in the ancient time art to achieve truth by disclosure of contradictions in judgment of the opponent and overcoming of these a contradiction. In the ancient time some folosofa considered that disclosure of contradictions in thinking and collision of opposite opinions is the best sensor of truth".
Socrates attached special significance to knowledge of essence of virtue. The moral person has to know that such virtue. Morals and knowledge from this point of view coincide; to be virtuous, it is necessary to know virtue as that, as "general", serving the main of all private virtues.