Philosophy Lexicon of Arguments

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Logical constants: logical constants are also called logical particles or connectives, they are e.g. “and”; “or”; “if”; “then”; “not”. The expression constant is used, because the meaning of the logical links cannot change also in the translation into other languages, but always remains. For example, if one was to try to replace "and" with "or" in the case of a translation, mistakes would arise which could be determined, even if the vocabulary of the foreign language is not entirely known.

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.

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EMD II 105
Logical Constants/Inferences/Meaning/Wittgenstein/Dummett: the acceptance of a system of inferences (relationships, truth table) contributes to the meaning of the involved words - N.B.: because speakers can give their words a different meaning, forms of generally accepted inferences may not be philosophically criticized - by rejection of certain forms of inference we affect the meaning of the logical constants. - Truth condition: So we cannot accept it as a general principle for the detection of the meaning.
EMD II 107
Logical Constants/Dummett: some authors: Davidson meaning theory does not provide the meaning of the non-logical basic concepts itself, but rather the logical constants. - E.g. "London denotes London" belongs to the theory of sense". - Logical constants: from the axioms: e.g. "for each sentence S and T [S or T] is true if and only if S is true or T is true". - N.B.: the truth theory does not force us at al to assume the traditional meanings of the log. const. - if they may also have a different meaning in the meta language, we may even keep the classical axioms!
EMD II 109
Logical Constants/Meaning/Dummett: no circle: when the logical constants occur themselves in an effective proof, because we assume that we understand the construction of the proof. - Problem: undecidable sentences: no effective proof, then there is a circle, then the meaning of the logical constants is not clear.

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.

Du I
M. Dummett
Ursprünge der analytischen Philosophie Frankfurt 1992

M. Dummett
Wahrheit Stuttgart 1982

G. Evans/J. McDowell
Truth and Meaning Oxford 1977

Ev I
G. Evans
The Varieties of Reference (Clarendon Paperbacks) Oxford 1989

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Ed. Martin Schulz, access date 2018-04-25