Another issue which relates to the use of the current urf in fatwas, is the use of ijtihad (individual interpretation or exertion of effort). The use of ijtihad was said to have been ended long before Ibn Abidin was a mufti. However, Ibn Abidin uses great amounts of effort in order to determine the correct answer to a problem in his fatwa, using the knowledge of the common urf and his own reasoning. He seems to have believed that ijtihad was still acceptable to use in certain circumstances.