Teachings about the ideal occur in the history of philosophy as a response to the challenge of ethical relativism. So it was in ancient Greek philosophy, where Plato, rejecting the doctrine of the Sophists on the general formation and relativity of the truth, introduced the hypothesis of Eidos. So it was in the Soviet philosophy of the 1960s, when E.V. Ilyenkov criticized the doctrine of D.I. Dubrovsky, who treated the ideal as subjectivity. Ilyenkov showed that it is impossible to prove the truth, and the ideals and scientific research itself without the objective existence of the ideal. In this regard, Plato and Ilyenkov, no matter how different their concepts are, appear as two representatives of the classical thought.
Teachings about the ideal occur in the history of philosophy as a response to the challenge of ethical relativism. So it was in ancient Greek philosophy, where Plato, rejecting the doctrine of the Sophists on the general formation and relativity of the truth, introduced the hypothesis of Eidos. So it was in the Soviet philosophy of the 1960s, when E.V. Ilyenkov criticized the doctrine of D.I. Dubrovsky, who treated the ideal as subjectivity. Ilyenkov showed that it is impossible to prove the truth, and the ideals and scientific research itself without the objective existence of the ideal. In this regard, Plato and Ilyenkov, no matter how different their concepts are, appear as two representatives of the classical thought.