4.
Commentary on the Triad of the Grasped
51.
In the section on questions of the clung-to and subject to clinging triad, the sense-base is a condition for subject to clinging aggregates by way of prenascence condition - this is said with reference to occurrence.
But at conception, that prenascence does not exist.
72.
"Clung-to and subject to clinging edible food is a condition for a clung-to and subject to clinging body by way of nutriment condition": here, clung-to and subject to clinging edible food means the nutritive essence internal to materiality originating from kamma.
"Of a clung-to and subject to clinging body" means it is a condition by way of nutriment condition for that very body of materiality originating from kamma.
It is a condition by way of maintenance and support for kamma-born materiality, like the material life faculty, not by way of being productive.
But that which they say - that the nutritive essence in the living body of frogs and so on is a condition by way of nutriment condition for the body of snakes and so on that remain having swallowed frogs and so on - that should not be accepted.
For the nutritive essence in a living body does not accomplish the conditionality of nutriment condition for another body.
As for "of a not clung-to but subject to clinging body," here, however, it is also obtained by way of being productive.
As for "of a clung-to and subject to clinging and a not clung-to but subject to clinging," here for one by way of being supportive, for one by way of being productive, or it is stated by way of being supportive for both.
But when two nutriments are conditions together, they are only supportive, not productive.
The remainder here should be understood by carefully examining the canonical text itself.
Commentary on the Triad of the Grasped.