192 – He said, “This is the consensus (ijmāʿ) of the scholars, not of those without knowledge, and it must be followed, for they alone possess the learning that others lack and they are united upon it. When they are unanimous, their agreement is an authoritative proof against the uninformed; but when they disagree, no proof arises from them over anyone. In that case the disputed point must be referred back to analogy (qiyās) on the basis of what they had agreed upon. Whatever state I find them in tells me about those before them: if they are unanimous, I know that the scholars of every earlier generation were likewise unanimous, for they would not all concur today had their predecessors differed; and if they are divided, I know that those before them, in every generation, were divided as well. It makes no difference whether their unanimity rests on a report (khabar) they transmit or on some other evidentiary ground, for they only agree on the strength of a binding report. Likewise, when they disagree, whether they relay a report that supports some of them or do not relate one at all is the same to me, for I accept from their reports only what they all endorse. As for anything over which they differ in acceptance, error can enter into it, and no authoritative proof is established by something in which error is possible.
193 – I said to him, “This virtually nullifies the reports while establishing consensus, for you have claimed that their disagreement is no proof, whether a report exists on the matter or not.”
194 – I then asked, “And who are the scholars whose consensus, when they agree, constitutes a binding proof?”
195 – He answered, “They are whomever the people of any town appoint as a jurist—someone whose opinion they approve of and whose verdict they accept.”
196 – I said, “Take such jurists whose consensus is deemed authoritative: if they are ten in number and one is absent, or is present but remains silent, would you still consider the agreement of the remaining nine a proof?”
197 – He replied, “Then, if you say: No …”