大般涅槃經義記 8.254

8.254

自下第二以名破有成其無義。「如其有者，何故不得二種名字」就乳正徵。乳中有酪，何故不得乳酪二名，偏名為乳？「如人二能」舉事類徵。

From here below is the second [clause], using names to refute existence and accomplish its meaning of nonexistence. 'If it exists, why does it not obtain two kinds of names?' directly questions regarding milk: If there is curd in milk, why does it not obtain the two names 'milk' and 'curd', but is exclusively named 'milk'? 'Like a person with two abilities' cites an everyday matter to question by analogy.