DOES XAJE NASIR-ODDIN-E TUSI BELIEVE IN THREE-VALUED LOGIC?

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DARABI A.R.; FALAHI A.A.

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Paper Information

Journal: RESEARCH ON METAPHYSIK Year:2009 | Volume:45 | Issue:1-2 Page(s): 115-128

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Information Journal Paper

Title

DOES XAJE NASIR-ODDIN-E TUSI BELIEVE IN THREE-VALUED LOGIC?

Author(s)

DARABI A.R. | FALAHI A.A. | Issue Writer Certificate

Keywords

THREE VALUED LOGIC - XAJE NASIR-OD-DIN-E-TUSIQ4

THIRD VALUEQ3

CONDITIONAL PROPOSITIONQ3

TRUEQ3

AND FALSEQ3

Abstract

In his book Asaso Al-eqtebas, Xaje Nasir-od-dine-e Tousi has given an analysis of connected CONDITIONAL PROPOSITIONs which is similar to the analysis of the CONDITIONAL PROPOSITIONs in three-valued logic. It raises the following question: does Tusi accept propositions with values other that “True” and “False”? In this article we consider Tusi’s view and those of his followers, and compare it with those who accept the three valued logic. We will show that Xaje didn’t believe that propositions can have a THIRD VALUE. Also we will show that in his analysis of connected CONDITIONAL PROPOSITION Xaje Nasir does not use the word “true” and “false” as they are commonly used by other logicians. They are rather used to mean TRUE AND FALSE in the analytic sense. We conclude, therefore, that in the text we consider “true” and “false” are not used in their ordinary and common sense. They are used, rather, homonymsly.

Cites

CONTINGENT CONDITIONALS IN MODERN LOGIC

References

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Cite

APA: Copy

DARABI, A.R., & FALAHI, A.A.. (2009). DOES XAJE NASIR-ODDIN-E TUSI BELIEVE IN THREE-VALUED LOGIC?. RESEARCH ON METAPHYSIK, 45(1-2), 115-128. SID. https://sid.ir/paper/157467/en

Vancouver: Copy

DARABI A.R., FALAHI A.A.. DOES XAJE NASIR-ODDIN-E TUSI BELIEVE IN THREE-VALUED LOGIC?. RESEARCH ON METAPHYSIK[Internet]. 2009;45(1-2):115-128. Available from: https://sid.ir/paper/157467/en

IEEE: Copy

A.R. DARABI, and A.A. FALAHI, “DOES XAJE NASIR-ODDIN-E TUSI BELIEVE IN THREE-VALUED LOGIC?,” RESEARCH ON METAPHYSIK, vol. 45, no. 1-2, pp. 115–128, 2009, [Online]. Available: https://sid.ir/paper/157467/en

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