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Non-existence, philosophy: non-existence is not simply expressible for the classical predicate logic which attributes properties through quantification in the form of (Ex)(Fx) "There is at least one x, with the property F" (in short "There is at least one F"), since existence is not a property. The form "There is at least one x that does not exist" is contradictory. See also existence predicate, "There is", existence, unicorn example, pegasus example, round square, proof of God's existence.
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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

Gottlob Frege on Non-Existence - Dictionary of Arguments

I 47
Nonexistence/unicorn-example/truth-value gap/Frege: e.g. unicorn: sentences about non-existent objects are without truth value.
Predicates cannot be assigned or denied. The thought is the same whether the name refers (>"meaning"/Frege = reference) or not. For the terminology: see Fregean Sense
, >Reference, >Predicate, >Unicorn example.
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Husted V 102
Name/non-existence/Frege: that the name has a reference is not the condition that it belongs to the language but vice versa. >Proper names.
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I 107
Non-existence/meaning/FregeVsMeinong/FregeVsRussell: there are quite a lot of contradictory terms. However, there are no contradictory objects. The logic may determine only the limitation of terms. That is, for each object, whether it falls within the definition, or not - a contradictory term is used to prove that there is no corresponding object. >Round square.
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IV 110
Non-existence/Frege: proper names: are names that refer to nothing, that are logically meaningless. But there are not a concept under which nothing falls - for a name to be entitled it is necessary that the appropriate term is sharp.
IV 111
Therefore the term should precede the scope.
>Term scope, >Concept.

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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.

F I
G. Frege
Die Grundlagen der Arithmetik Stuttgart 1987

F II
G. Frege
Funktion, Begriff, Bedeutung Göttingen 1994

F IV
G. Frege
Logische Untersuchungen Göttingen 1993

Husted I
Jörgen Husted
"Searle"
In
Philosophie im 20. Jahrhundert, A. Hügli/P. Lübcke, Reinbek 1993

Husted II
Jörgen Husted
"Austin"
In
Philosophie im 20. Jahrhundert, A. Hügli/P. Lübcke, Reinbek 1993

Husted III
Jörgen Husted
"John Langshaw Austin"
In
Philosophie im 20. Jahrhundert, A. Hügli/P. Lübcke, Reinbek 1993

Husted IV
Jörgen Husted
"M.A. E. Dummett. Realismus und Antirealismus
In
Philosophie im 20. Jahrhundert, A. Hügli/P. Lübcke (Hg), Hamburg 1993

Husted V
J. Husted
"Gottlob Frege: Der Stille Logiker"
In
Philosophie im 20. Jahrhundert, A. Hügli/P. Lübcke (Hg), Reinbek 1993


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