Philosophy Lexicon of Arguments

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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.
 
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I 47
Nonexistence/Unicorn-Example/Truth-value gap/Frege: E.g. Unicorn: sentence without truth value - predicates can not be switched on or denied - the thought is the same whether the name refers ("meaning", reference) or not.
V 102
Name/Non-existence/Frege/Husted: that the name has a reference is not a condition that it belongs to the language - but vice versa.
I 107
Nonexistence/Meaning/Meaning/FregeVsMeinong/FregeVsRussell: there are quite a lot contradictory terms - only 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.
IV 110
Nonexistence/Frege: proper names: a name that refers to nothing, is logically meaningless - but not a concept under which nothing falls - for a name to be entitled it is necessary that the appropriate term is sharp.
VI 111
Therefore the term should precede the scope.

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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.

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


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Ed. Martin Schulz, access date 2017-06-24