This book, authored by Kamal al-Din Abu al-Barakat Abd al-Rahman al-Anbari, is a seminal work in Arabic grammar, specifically focusing on the intellectual disputes between the two major schools of thought: the Basran and Kufan grammarians. Al-Anbari meticulously presents arguments from both sides on various grammatical issues, striving for an impartial and balanced assessment. The work, titled "Al-Insaf fi Masa'il al-Khilaf bayna al-Nahwiyyin al-Basriyyin wa al-Kufiyyin," serves as an indispensable reference for understanding the intricacies of Arabic linguistic debates and the methodologies employed by these influential schools. It provides profound insights into the development of Arabic grammar and the nuanced reasoning behind differing scholarly opinions, making it crucial for students and researchers of Arabic language and linguistics.