|Modal properties: are properties that are not attributed actually to an object, but are attributed in a possible world. A modal property is e.g. the property of being happier under other circumstances. The question is whether an object in the actual world must have a certain quality in order to have different properties in another world. See also modal logic, modal realism, possible worlds, centered worlds, contingency, possibility, necessity, properties, extensionality.|
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Indeterminacy/reference/name/representation/modal property/Possible World/vagueness/Stalnaker: if it is undetermined whether the object T has certain modal properties, then the name "T" is (in other worlds) indefinite.
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A propos I 191
Fact/Possible World/Stalnaker//(s): when asked for facts, they must always come from the respective possible world, because the worlds are separated .. - ((s)exception/(s): modal properties - so there are no facts about modal properties).
Ways a World may be Oxford New York 2003