Truth in philosophy and scientific cognition

The problem of the truth is the most important problem of philosophy and scientific knowledge. It has received fundamental development in classical philosophy including in philosophy of dialectic materialism where the contradictory maintenance of the truth is characterized, it is such gnoseological properties: objectivity and subjectivity, absoluteness and relativity, abstractness and concreteness. In modern domestic philosophy there were numerous followers of postmodernism which rejects almost all categories of classical philosophy including the concept "truth". They declare that the classical theory of the truth has become outdated and demands her reconsideration as she was based on ideals and norms of science of the 19th century. On this basis they deny basic provisions of the classical theory of knowledge: the theory of reflection, objectivity and absoluteness of the truth, also try to prove relativism in the field of an epistemology. But the relativism, as we know, inevitably leads to agnosticism. In article it is shown that the criticism of classical gnoseology has no sufficient reasons as is based on the wrong understanding of dialectics absolute and relative in the history of philosophy and science. It is given the critic of views M. Heidegger denying progress in scientific knowledge as, allegedly, each scientific theory is true only for the era, and views of T. Kuhn believing that new scientific theories are completely refuted by previous.