Timothy Williamson gives an original and provocative treatment of deep metaphysical questions about existence, contingency, and change, using the latest resourc

Timothy Williamson is one of the most influential living philosophers working in the areas of logic and metaphysics. His work in these areas has been particular

The philosophy of modality investigates necessity and possibility, and related notions--are they objective features of mind-independent reality? If so, are they

The only book to investigate the parallel between what happens at other times and what happens in other possible worlds.

Modal logic, developed as an extension of classical propositional logic and first-order quantification theory, integrates the notions of possibility and necessi