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Standard Semantics/modal logic/Hintikka: problem: the alternative worlds must be formed from the same individual domain and also from the same domain of predicates (basic term).
That is, the individuals must all already exist!
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Def Scenario/Hintikka: a scenario is everything that is compatible with the knowledge of a knowing person b. We can also call it b's worlds of knowledge.
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Def relevant world/Hintikka: relevant worlds are all those which are compatible with the knowledge of a person considered here.
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Def Qualitative/terminology/Hintikka: terminology corresponds to a yes-no distinction. Contrast: the contrast is comparative.
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Def Desideratum/Hintikka: the desideratum is the piece of information that provides a complete answer to a question. E.g. (3) is the desideratum of (2).
(2) Who killed Roger Ackroyd?
(3) I know who killed Roger Ackroyd.
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(3) can be analyzed as:
(4) (Ex) I know that (x killed Ackroyd)
Where "x" is about people.
Def Conclusive/conclusive answer/Hintikka: an answer is conclusive iff. (5) implies (4), for example,
(5) I know that d has killed Ackroyd.
(4) (Ex) I know that (x killed Ackroyd).
Problem: normally the implication is valid, but it can be because "d" (on different occasions) does not refer to the same person.
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Presupposition/questions/Hintikka: the presupposition of a question is obtained by omitting the extreme epistemic operator ("I know that") from the desideratum of the question.
Definition matrix of a question/Hintikka: the matrix of a question is the presupposition obtained from the desideratum without the utmost epistemic operator.
Def Meaning/Hintikka: meaning is the function of possible worlds on extensions.
Worlds: worlds are the arguments of functions that are meanings.
Intentionality/Hintikka: if intentionality is to be defined by the necessity of explaining it through possible worlds, we must examine possible counterexamples.