The rejected report falls into two kinds: that rejected because of an omission in the isnād, and that rejected because of criticism of the narrator.
Al-mursal is an omission from the end of the isnād, after the tābiʿī; one of the four kinds of rejected report rooted in a break in the chain.
Al-gharīb falls into two categories: al-fard al-muṭlaq (absolute solitary) and al-fard al-nisbī (relative solitary).
An omission of two or more consecutive narrators at any point in the chain — this is al-muʿḍal.
Ḥadīth, in the muḥaddithūn's classification, is of two categories: al-mutawātir and khabar al-wāḥid.
