|Modal logic: the modal logic is an extension of classical logic to systems in which possibility and necessity can also be expressed. Different approaches use operators to express "necessary" and "possible", which, depending on the placement within formulas, can let claims of different strengths win. E.g. there is an object which necessarily has the property F/it is necessary that there is an object with the property F. The introduction of possible worlds makes quantification possible for expressing possibility (There is at least one world in which ...) and necessity (For all worlds is valid ...). See also operators, quantifier, completion, range, possible worlds._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. |
Roderick Chisholm on Modal Logic - Dictionary of Arguments
Modal logic/possibility/necessity/Chisholm/Sauer: from M follows NM and vice versa: what is possible is necessarily possible - "There is a world, so that p each possible world is such that there is a world, so that p" - (s) no world excludes other worlds? - Suaer: NM is applicable when possibility is limited only by consistency - consistency is independend of which non-logical propositions are true.
Sauer, W. Über das Analytische und das synthetische Apriori bei Chisholm. In: M.David/L. Stubenberg (Hg) Philosophische Aufsätze zu Ehren von R.M. Chisholm Graz 1986_____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments The note [Author1]Vs[Author2] or [Author]Vs[term] is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.
The First Person. Theory of Reference and Intentionality, Minneapolis 1981
Die erste Person Frankfurt 1992
Philosophische Aufsäze zu Ehren von Roderick M. Ch, Marian David/Leopold Stubenberg, Amsterdam 1986
Roderick M. Chisholm
Theory of knowledge, Englewood Cliffs 1989
Erkenntnistheorie Graz 2004