因明入正理論疏 3.29

3.29

Question: 'Since it possesses each quality and action individually, why does he not say "possessing one quality and action"?' Answer: 'Substance has many classes; if he did not say "one" and merely said "possessing substance", he would commit the fault of being inconclusive, for daughter atoms and so forth all possess substance. Quality and action require no qualification, so the word "one" is not needed.'