In the paper the problem of applicability of scientific criterions in the process of construction of humanitarian theory. Subjectness, objectivity, truth, validity, verification, falsification as criterions were formed in natural sciences. These criteria should be interpreted in a new way in view of specificity of humanitarian knowledge. The analysis of the problem is based on studying a historical example of construction of a humanitarian theory. As an example experience of construction of the theory of law by Hans Kelsen in jurisprudence is examined.
