David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
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History and Philosophy of Logic 30 (3):209-225 (2009)
The principle that a necessarily false proposition implies any proposition, and that a necessarily true proposition is implied by any proposition, was apparently first propounded in twelfth century Latin logic, and came to be widely, though not universally, accepted in the fourteenth century. These principles seem never to have been accepted, or even seriously entertained, by Arabic logicians. In the present study, I explore some thirteenth century Arabic discussions of conditionals with impossible antecedents. The Persian-born scholar Afdal al-Dīn al-Kh najī (d.1248) suggested the novel idea that two contradictory propositions may follow from the same impossible antecedent, and closely related to this point, he suggested that if an antecedent implies a consequent, then it will do so no matter how it is strengthened. These ideas led him, and those who followed him, to reject what has come to be known as 'Aristotle's thesis' that no proposition is implied by its own negation. Even these suggestions were widely resisted. Particularly influential were the counter-arguments of Na īr al-Dīn al-T ī (d.1274)
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References found in this work BETA
Storrs McCall (1966). Connexive Implication. Journal of Symbolic Logic 31 (3):415-433.
Nicholas Rescher (1964). The Development of Arabic Logic. [Pittsburgh]University of Pittsburgh Press.
Christopher Martin (1991). The Logic of Negation in Boethius. Phronesis 36 (3):277-304.
Klaus Jacobi (ed.) (1993). Argumentationstheorie: Scholastische Forschungen Zu Den Logischen Und Semantischen Regeln Korrekten Folgerns. E.J. Brill.
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