• Bidʿah mukaffirah: the report of a narrator who holds it is not a valid proof.
• Bidʿah mufassiqah: the narrator’s report is reliable subject to two conditions.
The two categories do not have the same stated ruling. Acceptance in the second category must not be separated from its conditions.
1. One who holds or commits it: a person to whom that belief or practice pertains.
2. Ḥujjah: a report that can be relied upon as evidence.