Al-Insaf fi Masa'il al-Khilaf, authored by Kamal al-Din Abi al-Barakat Abd al-Rahman ibn Ubayd Allah al-Anbari, stands as a pivotal work in Arabic linguistic scholarship. This seminal text meticulously examines the long-standing grammatical disputes between the influential Basran and Kufan schools of thought. Al-Anbari skillfully presents the arguments and counter-arguments of each school with remarkable fairness and scholarly rigor, demonstrating his profound mastery of Arabic grammar and philology. The book's objective approach to these complex disagreements makes it an indispensable resource for understanding the nuances and evolution of Arabic grammatical theory, offering invaluable insights into the methodological divergences and intellectual vibrancy of classical Arabic linguistics.