Psychology Dictionary of Arguments

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Copula: a copula is a connection of the subject with a predicate within a sentence or statement. E.g. the sky is blue. The copula is not the same as the "is" of identity.

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

Gottlob Frege on Copula - Dictionary of Arguments

I 90
Copula/Frege: a coplua can be found in the sentence e.g. "The sky is blue". Contrast: a contrast is offered by the equation: "The number of Jupiter’s moons equals four". The four contains nothing related to Jupiter and moon.
>Equal sign, >Equation, >Identity.
I 109
Equal Sign/"="/Frege/(s): the equal sign links objects, not concepts or predicates with properties. By contrast, the copula/(s): links an object with a concept.
>Concept, >Object.
- - -
IV 100
The copula does not express identity: "sky = blue", but a simple "is". (The predicate is enclosed). Correct: "The sky is a blue thing": "A is a B". (> indefinite article).

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.

G. Frege
Die Grundlagen der Arithmetik Stuttgart 1987

G. Frege
Funktion, Begriff, Bedeutung Göttingen 1994

G. Frege
Logische Untersuchungen Göttingen 1993

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