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In philosophical logic, the logical hexagon (also called the hexagon of opposition) is a conceptual model of the relationships between the truth values of six statements. It is an extension of Aristotle's square of opposition. It was discovered independently by both Augustin Sesmat and Robert Blanché. This extension consists in introducing two statements U and Y. Whereas U is the disjunction of A and E, Y is the conjunction of the two traditional particulars I and O.

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  • Hexagone logique (fr)
  • Esagono logico (it)
  • Logical hexagon (en)
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  • In philosophical logic, the logical hexagon (also called the hexagon of opposition) is a conceptual model of the relationships between the truth values of six statements. It is an extension of Aristotle's square of opposition. It was discovered independently by both Augustin Sesmat and Robert Blanché. This extension consists in introducing two statements U and Y. Whereas U is the disjunction of A and E, Y is the conjunction of the two traditional particulars I and O. (en)
  • L'hexagone logique (également appelé hexagone d'opposition) met en évidence des connexions entre six types d'assertions qui sont reliées entre elles par leurs valeurs de vérité. C'est une extension du carré logique d'Aristote découverte de façon indépendante à la fois par Augustin Sesmat et par Robert Blanché qui consiste à introduire deux nouvelles connexions Y et U, Y étant la conjonction de I et O tandis que U est la disjonction de A et E. (fr)
  • L'esagono logico è un modello concettuale delle relazioni esistenti fra i valore di verità di sei proposizioni. Si tratta di una estensione del quadrato delle opposizioni, derivato da Aristotele.Per vie parallele e indipendenti, fu scoperto dal logico francese Augustin Sesmat (1885-1957) e dal filosofo della matematica Robert Blanché (1898–1975). L'estensione consiste nell'introduzione di due proposizioni U e Y, dove U è la disgiunzione degli universali A ed E, mentre Y è la congiunzione delle due tradizionali proposizioni particolari I ed O. (it)
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  • In philosophical logic, the logical hexagon (also called the hexagon of opposition) is a conceptual model of the relationships between the truth values of six statements. It is an extension of Aristotle's square of opposition. It was discovered independently by both Augustin Sesmat and Robert Blanché. This extension consists in introducing two statements U and Y. Whereas U is the disjunction of A and E, Y is the conjunction of the two traditional particulars I and O. (en)
  • L'hexagone logique (également appelé hexagone d'opposition) met en évidence des connexions entre six types d'assertions qui sont reliées entre elles par leurs valeurs de vérité. C'est une extension du carré logique d'Aristote découverte de façon indépendante à la fois par Augustin Sesmat et par Robert Blanché qui consiste à introduire deux nouvelles connexions Y et U, Y étant la conjonction de I et O tandis que U est la disjonction de A et E. (fr)
  • L'esagono logico è un modello concettuale delle relazioni esistenti fra i valore di verità di sei proposizioni. Si tratta di una estensione del quadrato delle opposizioni, derivato da Aristotele.Per vie parallele e indipendenti, fu scoperto dal logico francese Augustin Sesmat (1885-1957) e dal filosofo della matematica Robert Blanché (1898–1975). L'estensione consiste nell'introduzione di due proposizioni U e Y, dove U è la disgiunzione degli universali A ed E, mentre Y è la congiunzione delle due tradizionali proposizioni particolari I ed O. (it)
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