|Accessibility, philosophy: accessibility is an expression of a relationship between possible worlds. For example, a world with IT technology is not accessible from a world where the wheel has not yet been invented. See also modal logic, possible worlds, systems, S 4/S 5, knowledge, transitivity, counterpart theory, centered worlds, cross world identity._____________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. |
Maxwell J. Cresswell on Accessibility - Dictionary of Arguments
Hughes I 67f
Accessibility/possible worlds/Hughes/Cresswell: many authors: From conceivability or imaginability - e.g. game: the visibility relation between players. - Invisible worlds are not taken into account - always considered conceivability of worlds from the actual world: corresponding system T.
Necessity/T: Truth in a selected set of worlds.
System T: necessity: only considers worlds that we can imagine.
System S4: Transitivity of conceivability: what could be conceivable in other worlds. - (i.e. conceivable in a possible world, which in turn can be imagined from the actual world). - Then we have another necessity: truth in all worlds. -
System S5: all are visible to all, not a question of imagination._____________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.
M. J. Cresswell
Semantical Essays (Possible worlds and their rivals) Dordrecht Boston 1988
M. J. Cresswell
Structured Meanings Cambridge Mass. 1984
Maxwell J. Cresswell
Einführung in die Modallogik Berlin New York 1978