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Philosophy Dictionary of Arguments

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Index words: index words are words like “here”, “there”, “now”, “me”, etc. which require a closer determination, so that a sentence which includes them can be determined whether it is true or false. A sentence with index words is therefore context-dependent. Index words are not demonstratives. See also deixis, anaphora, context dependency, indexicality.
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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.

 
Author Concept Summary/Quotes Sources

Charles Sanders Peirce on Index Words - Dictionary of Arguments

Berka I 29
Index/indicator/Peirce: E.g. pointing finger - the physical evidence: does not say anything, it just says "there!"
>Indexicality
, >Ostension, >Pointing, >Ostensive definition.
Berka I 30
Conclusion/Peirce: needs in addition to symbol (for truth) and index (both together (for sentence formation) the 3rd character: the icon: because inference consists in the observation that where certain relations exist, some other relations can be found.
>Conclusion, >Symbols, >Icons, >Relations.
These relations must be represented by an icon - e.g. the middle term of the syllogism must actually occur in both premises.(1)
>Syllogisms, >Premises.
Berka I 31
E.g. the empty spaces that must be filled with the symbols (x, y, ...) are indices of symbols.(1)
>Variables, >Constants, Individual variables, >Individual constants, >Logical operations, >Logical formulas.

1. Ch. S. Peirce, On the algebra of logic. A contribution to the philosophy of notation. American Journal of Mathematics 7 (1885), pp. 180-202 – Neudruck in: Peirce, Ch. S., Collected Papers ed. C. Hartstone/P. Weiss/A. W. Burks, Cambridge/MA 1931-1958, Vol. III, pp. 210-249

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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.

Peir I
Ch. S. Peirce
Philosophical Writings 2011

Berka I
Karel Berka
Lothar Kreiser
Logik Texte Berlin 1983


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Ed. Martin Schulz, access date 2024-04-23
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