«حكمه: يوجب علم طمأنينة، ويكون رده بدعة»
Its ruling: it yields settled reassurance, and the author describes rejection of such an established report as innovation.
ʿIlm al-tumaʾninah is distinguished from the immediate certainty associated with mutawatir. It indicates powerful confidence, not the same grade of certainty.
The label bidʿah belongs to the textbook’s particular usuli classification. It must not be applied indiscriminately to everyone who investigates transmission or participates in an informed scholarly disagreement.