4. Commentary on the Triad-Dyad Conditional Relations
In the Tika-Duka Paṭṭhāna too, the teaching was given by way of merely extracting the questions thus: "A wholesome root mental state arises dependent on a wholesome root mental state by root condition." Therein, just as above the teaching was given in brief by combining the wholesome term with the root dyad by way of all conditions in all sections, so here the teaching was given in brief by combining the root term with the triad of wholesome by way of all conditions in all sections. And just as the root term, so also the non-root term was combined with the triad of wholesome, and the wholesome-triad-root-dyad was completed. Thereafter, by the method beginning with "a root mental state associated with pleasant feeling," twenty-one triad-dyads beginning with the feeling-triad-root-dyad were shown.
Thus, having combined the root dyad with the twenty-two triads, again together with those very same, all dyads beginning with the with-root dyad and ending with the conflicting dyad were combined according to what is obtainable. Here too, whatever term does not enter into combination, that was rejected in the canonical text itself. Thus, taking the hundred dyads and incorporating them into the twenty-two triads, what is called the Tika-Duka Paṭṭhāna was taught. Therein too, by whatever method the canonical text was abbreviated, that method should be understood in detail.
Commentary on the Triad-Dyad Conditional Relations.