Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic?
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” a...
| Main Authors: | , |
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| Format: | Article |
| Language: | fas |
| Published: |
University of Isfahan
2009-01-01
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| Series: | Metaphysics |
| Online Access: | http://uijs.ui.ac.ir/mph/browse.php?a_id=7&sid=1&slc_lang=en |
| _version_ | 1797969348192632832 |
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| author | Ali Reza Darabi Dr Asad _allahe falahiy |
| author_facet | Ali Reza Darabi Dr Asad _allahe falahiy |
| author_sort | Ali Reza Darabi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-11T02:59:41Z |
| format | Article |
| id | doaj.art-951641f6cc174d4a9138126d5018bd13 |
| institution | Directory Open Access Journal |
| issn | 2008-8086 |
| language | fas |
| last_indexed | 2024-04-11T02:59:41Z |
| publishDate | 2009-01-01 |
| publisher | University of Isfahan |
| record_format | Article |
| series | Metaphysics |
| spelling | doaj.art-951641f6cc174d4a9138126d5018bd132023-01-02T14:18:25ZfasUniversity of IsfahanMetaphysics2008-80862009-01-0111&2Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic?Ali Reza DarabiDr Asad _allahe falahiyIn 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.http://uijs.ui.ac.ir/mph/browse.php?a_id=7&sid=1&slc_lang=en |
| spellingShingle | Ali Reza Darabi Dr Asad _allahe falahiy Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic? Metaphysics |
| title | Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic? |
| title_full | Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic? |
| title_fullStr | Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic? |
| title_full_unstemmed | Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic? |
| title_short | Does Xaje Nasir-oddin-e Tusi Believe in Three-valued Logic? |
| title_sort | does xaje nasir oddin e tusi believe in three valued logic |
| url | http://uijs.ui.ac.ir/mph/browse.php?a_id=7&sid=1&slc_lang=en |
| work_keys_str_mv | AT alirezadarabi doesxajenasiroddinetusibelieveinthreevaluedlogic AT drasadallahefalahiy doesxajenasiroddinetusibelieveinthreevaluedlogic |