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 ...

Tradition states that above the entrance to Plato’s Academy were inscribed the words, “Let no one ignorant of geometry enter here.” A student in the modal logic interim course studies how subjunctives ...

Kit Fine (Philos Perspect 8:1–16, 1994) famously objected against the idea that essence can be successfully analyzed in terms of de re necessity. In response, Iwant to explore a novel, interesting, ...

A hypermodality is a connective whose meaning depends on where in the formula it occurs. The paper motivates the notion and shows that hypermodal logics are much more expressive than traditional modal ...

Do you suffer from anxiety in your everyday life? This blog shows how a form of logic known as alethic modal logic can be used with logic-based therapy (LBT) to construct the emotional reasoning that ...