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Phenomenology/Hintikka: one can say that phenomenology is actually a study of meanings and significance.
Meaning/Husserl/Hintikka: thesis: all meaning is ultimately expressed as linguistic meaning.
Definition Meaning/Hintikka: Function of possible worlds on extensions.
Worlds: are the arguments of functions that are meanings.
Intentionality/Hintikka: if it is to be defined by the necessity of explaining it through possible worlds, we must examine possible counterexamples.
Jaakko and Merrill B. Hintikka
The Logic of Epistemology and the Epistemology of Logic Dordrecht 1989
J. Hintikka/M. B. Hintikka
Untersuchungen zu Wittgenstein Frankfurt 1996