South American Journal of Logic
Volume 3, Issue 2, December 2017
Special Issue
5th World Congress on the Square of Opposition
Easter Island, November 11-15, 2016

Logical Conversions
Paul J. E. Dekker
ILLC/Department of Philosophy University of Amsterdam, The Netherlands

Duality Patterns in 2-PCD Fragments
Hans Smessaert and Lorenz Demey
Department of Linguistics and Center for Logic and Analytic Philosophy KU Leuven, Belgium

Possibility, Contingency and the Hexagon of Modalities
Jean-Yves Beziau
Department of Philosophy, University of Brazil, Rio de Janeiro

Extension in The Port Royal Logic
John N. Martin
Department of Philosophy, University of Cincinnati, USA

Aristotle's Squares of Opposition
Manuel Correia
Department of Philosophy Ponti cal Catholic University of Chile, Santiago, Chile

Is there a formula to express the disparatae medieval sentences? A positive answer
Juan Manuel Campos Benítez
Department of Philosophy Benemérita Autonomous University of Puebla, Mexico

Caramuel's Theory of Opposition
Wolfgang Lenzen
Department of Philosophy University of Osnabrück, Germany

The Hexagon of Paintings
Catherine Chantilly and Jean-Yves Beziau
Department of Philosophy University of Rio de Janeiro, Brazil and Brazilian Academy of Philosophy

Aristotelian Relations in PDL: The Hypercube of Dynamic Oppositions
José David García Cruz
Facultad de Psicología, Instituto de Estudios Universitarios, Puebla, Mexico

Squaring the unknown: The generalization of logic according to G. Boole, A. De Morgan, and C. S. Peirce
Cassiano Terra Rodrigues
Department of Humanities, Division of Fundamental Sciences (IEFH), Technological Institute of Aeronautics (ITA), Brazil

Awareness and Creativity by Evolutive EPM
Rodolfo A. Fiorini and Piero De Giacomo
Department of Electronics, Information and Bioengineering (DEIB), Politecnico di Milano University, Milano, Italy and Department of Neuroscience and Sense Organs, University Aldo Moro, Bari, Italy