ভূমিকা
Shiavault - a Vault of Shia Islamic Books Logic in the Islamic Legacy: a General Overview Logic and Language Al-farabi explains how logic, grammar and language relate to each other: And this art (of logic) is analogous to the art of grammar, in that the relation of the art of logic to the intellect and the intelligibles is like the relation of the art of grammar to language and expressions.
That is, to every rule for expressions which the science of grammar provides us, there is a corresponding [rule] for intelligibles which the science of logic provides us (Ihsa' al-'ulum, in Amin 1968: 68). al-Farabi argues that logic and grammar both have some legitimate interest in language, but whereas grammatical rules primarily govern the use of language, logical rules primarily govern the use of intelligibles.
More precisely, al-Farabi explains that although grammar and logic share a mutual concern with expressions, grammar provides rules that govern the correct use of expressions in a given language, but logic provides rules that govern the use of any language whatsoever in so far as it signifies intelligibles. Thus, logic will have some of the characteristics of a universal grammar, attending to the common features of all languages that reflect their underlying intelligible content.
Some linguistic features will be studied in both logic and grammar, but logic will study them as they are common, and grammar in so far as they are idiomatic.
On the basis of this comparison with grammar, then, al-Farabi is able to complete his characterization of the subject matter of logic as follows: 'The subject-matters of logic are the things for which logic provides the rules, namely, intelligibles in so far as they are signified by expressions, and expressions in so far as they signify intelligibles' (Ihsa' al-'ulum, in Amin 1968: 74).
Alfarabi adds: Logic shares something with grammar in that it provides rules for expressions, yet it differs in that grammar only provides rules specific to the expressions of a given community, whereas the science of logic provides common rules that are general for the expressions of every community. This is to say - logic is something of a universal grammar or, more strictly, providing a universal grammar is one of the tasks of logic.