The Science of hadith (Arabic: `Ulum al-Hadith) is a general category consisting of the numerous disciplines used in the study of hadith. It is the process that Muslim scholars use to evaluate hadith, utilizing Hadith terminology. It has been described by one hadith specialist, Jalal al-Din al-Suyuti, as the science of the principles by which the conditions of both the sanad, the chain of narration, and the matn, the text of the hadith, are known. This science is concerned with the sanad and the matn with its objective being distinguishing the sahih, authentic, from other than it. Ibn Hajar said the preferred definition is: knowledge of the principles by which the condition of the narrator and the narrated are determined.