some logicians as avicenna, khaja nasir al-din tusi, and dabiran katebi believe that denotation (dilala) is dependent on volition (irada), and as long as there is no volition, there is no denotation. some others like qutb al-din razi completely reject this idea and maintain that denotation merely depends on “knowledge of designation” (al-ilm bi al-wad’). some of methodologicians of jurisprudenc...

avicenna has divided the conditionals to the real cogent (i.e. with possible antecedent) and the verbal cogent (i.e. with the impossible antecedent). denying the truth of the latter, he caused controversies among moslem logicians. at the paper, we report the controversies, analyze the real and verbal cogent conditionals, formalize them in modern modal and relevant logics, and finally, defend id...

one ef the most important innovations in the history ef traditional logic is the avicena's theory ef temporal modalities (.atm). althottgh) the basic concepts and elements ef this theory are fottnded in aristotelian and stoic-lvlegarian !0 gic) but as a independent lo,gical system, are devised on/y fry avicenna and were later developed and completed fry his followers. the atm theory contai...

the topic of “trilogical denotations” (al-dalalat al-thalath) appears in avicenna logic system following the development of the discourse on “terms subject” (al-mabahith al-alfad) in his system. it was avicenna, who, for the first time, paid more attention to this subject and was responsible for its extended discussion. among the issues to which he addresses is the one on trilogical denotations...

aristotle took per impossibile as a form of hypothetical syllogism which was composed of a syllogistic and a non-syllogistic part. but he didn’t express the relation between these two parts clearly. alexander of aphrodisias and philoponus didn’t add any specific comments to aristotle’s view. al-farabi believed that per impossible includes three deductions: two categorical syllogisms and one exc...

The heritage of Abu Ali al-Husayn ibn Abd Allah ibn Sina (known in Europe as Avicenna, hereinafter referred to as Avicenna; around 980-1037 ce)has been used in the practice of doctors of various specialties in the treatment of various diseases for many centuries. Extensive clinical experience accumulated over a long time is actively used in modern medicine. Avicenna has had an invaluable contri...

â â â  avicenna and the arabic phonetics â â â â â  * mahmood shakib ansari â  * * alireza yusofi â â â  abstract â  avicenna, the iranian philosopher and sage, mostly famous for his scientific works such as law and the shifa has done some studies in arabic phonetics as well. besides pointing to some physical aspects of sounds in the above mentioned books, he has also written a monograph in ara...

With due regard to the side effects of some modern medications in the recent years, attentions have been drawn to some other alternatives such as herbal medicine. The latter drives from traditional and eastern medicine. Pioneers such as Avicenna are at the center of eastern, Iranian and Islamic medicine. This research aims at drawing attention of physicians, dentists and researchers to the subj...