The issue presents works from the field of non-classical and philosophical logic, as well as the history of Byzantine logic and the history of logical research in pre-revolutionary Russia. N. Arkhiereev proposes a new method of constructing non-standard semantics for modal logics. L. Devyatkin gives an overview of the use of multivalued matrices of classical logic as a tool for the analysis of other multivalued logics. E. Dragalina-Chernaya examines the origins of logical hylomorphism in search of the answer to the question, what is formal logic? D. Tiskin's paper is devoted to an unconventional interpretation of de re in reports regarding propositional attitudes.