«وهو يوجب العمل به في الأحكام الشرعية»
An accepted solitary report obliges action in matters of law.
A practical obligation to act on a report and decisive certainty about its attribution are not identical. Actionable proof need not possess the epistemic status assigned to tawatur.
A jurist may use a properly established report to formulate a ruling on ablution or prayer without claiming that the report has the certainty of continuous mass transmission. The distinction safeguards both the authority of evidence and appropriate limits of certainty.