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Journal of Philosophical Logic
Article . 1981 . Peer-reviewed
License: Springer TDM
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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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Data sources: zbMATH Open
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Article . 1981
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A surprising consequence of the Tractatus

Authors: Michael Kass;

A surprising consequence of the Tractatus

Abstract

THEOREM. If three objects are ordered for all states of affairs in a world containing a finite number of facts, they cannot have the same logical form (Assuming the Tractatus). Outline of Proof. There are six different possible orderings of three objects but 2n states of affairs for a world with n facts. Since 2n is not divisible by six, there is an asymmetry in the way states of affairs get mapped on to orderings. This asymmetry is exploited to create a predicate which picks out a particular object independently of the state of affairs. This immediately implies that the objects cannot have the same logical form, for if they did they would be indistinguishable. Proof. There are six possible ways for three objects to be ordered so let Pi, 1 6 which implies that n > 3. Let Ai be the number of distinct states of affairs which result in the order asserted by Pi. Then

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Keywords

ontology, Philosophical and critical aspects of logic and foundations, logical form

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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