Elena Ficara is akademische Oberrätin a. Z. at the University of Paderborn, Germany. Her works include: The Form of Truth. Hegel's Philosophical Logic (2021); (ed.) Contradictions. Logic, History, Actuality (2014).

Graham Priest is Distinguished Professor of Philosophy at the Graduate Center, City University of New York, and Boyce Gibson Professor Emeritus at the University of Melbourne. He is known for his work on non-classical logic, metaphysics, the history of philosophy, and Buddhist philosophy. For further details see grahampriest.net.