abu ali al-farsi's points of view regarding syntactic evidence & analogy

since the appearance of the knowledge of syntax the grammarians made an effort to develop the rules of arabic language, through which the quran was sent down. to do this they considered some principles:1 ) to develop the rules of syntax they only referred to the language of arab noble and eloquent tribes. 2) they developed the rules of syntax based on the widespread and prevalent language of arabs and considered the others rare and unusual and deemed it sufficient to be recorded and did not adhere to those rare instances. 3) they developed syntactic rules based on speech and dialects of eloquent arabs and considered oral language as a base for written one ,in this way they deduced written language through the speech and dialects of eloquent arabs . in this study ,we have tried to explore abu ali al-farsi's points of view ,one of the distinguished grammarians in the 4th century of higra, regarding syntactic evidence & analogy . he believed that the syntactic rules have to be derived from dominant arabic language and not from rare dialects. he also thought that acceptance by usage is more important than analogy which can not be given greater value than the accepted dominant language.