Jaakko Hintikka on Individuals - Dictionary of Arguments
Individual/well-defined/Hintikka: an individual is well-defined if it can be picked out by a name at a node of the world line.
World Line: a world line can link non-existent embodiments of individuals as long as they are well-defined, for all worlds in which a node of the world line is localizable.
Truth conditions are then simple: (Ex) p (x) is true in world w iff. there is an individual, e.g. with the name z such that p (z) is true in w.
Individual/possible worlds/existence/Hintikka: how can an individual exist in several worlds? (By being in different worlds in different relations to its environment?)
World Line/Hintikka: we must distinguish two ways, in which a world line cannot be drawn.
Case 1: our criteria of cross-world identification work with individual i would still fail in world w, which leads us to say that i does not exist in w.
Case 2: more radical: the criteria fail even in the sense that they cannot tell us what i is at all, then we cannot decide whether i exists in w or not (well-defined).
Well-defined/existence/Hintikka: N.B.: we can now say: thesis: that well-defined objects are in a certain sense in the actual world. This is the best rational reconstruction._____________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 [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.
Merrill B. Hintikka
Untersuchungen zu Wittgenstein Frankfurt 1996
Merrill B. Hintikka
The Logic of Epistemology and the Epistemology of Logic Dordrecht 1989