Max Freund
Max Freund is a professor of logic and philosophy at the University of Costa Rica. He is co-author, with Nino Cocchiarella, of Modal Logic: its Syntax and Semantics (Oxford University Press, 2008), author of The logic of sortals: a conceptualist approach, Synthese Library (Springer Verlag, 2019) and of Legal Logic (Instituto de Prensa Tecnológica de Costa Rica, 2007), as well as numerous magazine articles. He is also co-editor of the volume Logic and Philosophy of Logic: recent trends in Latin America and Spain (College Publications, 2018). His areas of expertise include modal logic, epistemic logic, computability theory, foundations of mathematics, second-order and higher-order logic, logic of the sorts, and logic applied to law.
Max
Freund
A Tense Epistemic Deontic Logic
Abstract: Within legal contexts, claim to knowledge requires that the evidence appealed to fulfills conditions established by legal norms that belong to the so-called Evidence Law. This kind of epistemic justification grounds different epistemic operators. We shall here study one of these possible operators in its relationship to deontic and tense propositional connectives. Our goal is to formally capture the three-dimensional logic involved in the logical connection between the three sorts of operators. Thus, we characterize a formal language formally representing the three different sorts of logical constants, construct the formal semantics of the language and characterize a formal logical system. We prove soundness and completeness for the system with respect to the semantics. The intuitive background of the three-dimensional logic will include several philosophical tenets regarding the Evidence Law.