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DBpedia 2014
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Matches in DBpedia 2014 for
{ ?s ?p <http://www.proofwiki.org/wiki/Category:Propositional_Calculus> . }
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Negation_introduction
wikiPageExternalLink
Category:Propositional_Calculus
.
Propositional_calculus
wikiPageExternalLink
Category:Propositional_Calculus
.
