Modal logic, an extension of classical logic, investigates the modes of truth such as necessity and possibility. Its development has been closely intertwined with advances in proof theory, a field ...

Girard introduced phase semantics as a complete set-theoretic semantics of linear logic, and Okada modified phase-semantic completeness proofs to obtain normalform theorems. On the basis of these ...

Karl-Georg Niebergall, On the Logic of Reducibility: Axioms and Examples, Erkenntnis (1975-), Vol. 53, No. 1/2, Concepts of Reduction in Logic and Philosophy (2000), pp. 27-61 ...

Explore the logical and historical evidence supporting the preservation of the Quran after the death of the Prophet Muhammad (sallallaahu alayhi wa sallam). This page delves into the continuous ...