四分律刪繁補闕行事鈔 1.154

1.154

癡鈍人者，不知言義，未了是非，則非斷割之匠。必言解羯磨，齊文而已，亦開成足。

A foolish and dull person: not knowing the meaning of words and not understanding right and wrong, they are not a judge capable of deciding matters. If they say they understand the karman, merely conforming to the text, they are also permitted to make up the quorum.