TY JOUR TI The problem of certainty of legal cognition (in the context of the evolution of Nature Law)** KW natural law KW certainty KW uncertainty KW classical theories KW postmodernism KW positive law KW human dimension JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Lukovskaya, D.I. AU Lomakina, I.B. PY 2020 IS 2020 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION