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Epistemic logic, skepticism, and non-normal modal logic

✍ Scribed by P. K. Schotch; R. E. Jennings


Publisher
Springer Netherlands
Year
1981
Tongue
English
Weight
867 KB
Volume
40
Category
Article
ISSN
0031-8116

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


Normal derivability in modal logic
✍ Jan von Plato πŸ“‚ Article πŸ“… 2005 πŸ› John Wiley and Sons 🌐 English βš– 89 KB

The standard rule of necessitation in systems of natural deduction for the modal logic S4 concludes A from A whenever all assumptions A depends on are modal formulas. This condition prevents the composability and normalization of derivations, and therefore modifications of the rule have been suggest

Modal sequents for normal modal logics
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## Abstract We present sequent calculi for normal modal logics where modal and propositional behaviours are separated, and we prove a cut elimination theorem for the basic system K, so as completeness theorems (in the new style) both for K itself and for its most popular enrichments. MSC: 03B45, 03

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This survey brings together a collection of epistemic logics and discusses their approaches in alleviating the logical omniscience problem. Of particular note is the logic of implicit and explicit belief. Explicit belief refers to information actively held by an agent, while implicit belief refers t

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## Abstract It is known that a theory in S5‐epistemic logic with several agents may have numerous models. This is because each such model specifies also what an agent knows about infinite intersections of events, while the expressive power of the logic is limited to finite conjunctions of formulas.