stylistic:tone
Biographical evaluation

Biographical analysis (‘ilm al-rijāl, lit. "science of people", also "science of Asma Al-Rijal or ‘ilm al-jarḥ wa al-taʻdīl ("science of discrediting and accrediting"), in which details about the transmitter are scrutinized. This includes analyzing their date and place of birth; familial connections; teachers and students; religiosity; moral behaviour; literary output; their travels; as well as their date of death. Based upon these criteria, the reliability (thiqāt) of the transmitter is assessed. It is also determined whether the individual was actually able to transmit the report, which is deduced from their contemporaneity and geographical proximity with the other transmitters in the chain. Examples of biographical dictionaries include: Abd al-Ghani al-Maqdisi 's Al-Kamal fi Asma' al-Rijal, Ibn Hajar al-Asqalani's Tahdhīb al-Tahdhīb and al-Dhahabi 's Tadhkirat al-huffaz.