四分律刪繁補闕行事鈔 1.61

1.61

If both text and meaning are lacking, one may cite one instance to infer the rest; or, based on what exists in principle, accomplish the preceding affair; or, though the text is complete, if there is a deficiency in meaning, one then determines it by the meaning—for as the treatises say, principle is taken as standard! Or, though the meaning must necessarily be established, if this school lacks the text, one refers comprehensively to other schools to put an end to other criticisms.