Whoever expands the interrogations is praiseworthy. It [once] happened that Ben Zakkai interrogated concerning the stems of figs. What [difference] is there between examinations and interrogations? [In the case of] examinations, [if] one says, “I do not know,” their testimony is null. [In the case of] interrogations, [if] one says, “I do not know,” or even [if] two say, “We do not know,” their testimony is upheld. Whether [in the case of] examinations or [in the case of] interrogations, if they contradict each other, their testimony is null.