Book review: Al-Khunaji’s Logic (Fallahi, Asadollah, (2013), Al-Khunaji’s Logic, The Iranian Institute of Philosophy, Tehran)

Abstract

Khunaji’s logic deal with the logical novelties Afzal al-din al-Khunaji in his Kashf al-asrar an ghawamiz al-afkar. Among all the novelties of Kashf on concepts, defintion, propositons, and categorical and hypothetical syllogisms, Khunaji’s logic just deals with the following titles: real and external (haqiqi and khariji) propositions (five chapters), tautologies (five chapters), modalities (three chapters), and convesion (three chapters). In Khunaji’s logic, his points of views have been compared with those of his predessesors such as Avicenna and Fakhr al-din al-Razi. All these have been acomplished using methods of the modern mathematical logic.

Keywords

• khunaji
• kashf al-asrar an ghawamiz al-afkar
• logic in 7th/13th century
• real and external (haqiqi and khariji) propositions
• tautologies
• modalities
• and convesion