成唯識論述記 8.59

8.59

述曰：六因之中皆有因緣能生所攝，此二種子既是因緣，故六因中有因緣者皆此所攝，若不爾者，即攝因緣不遍盡故。問：既爾，現行熏成種亦因緣收，何故此中不攝？亦非盡理故？

The Commentary states: Among the six causes, there are all [types of] direct causes subsumed under the productive cause. Since these two kinds of seeds are direct causes, those among the six causes that are direct causes are all subsumed under this. If not, the subsumption of direct causes would not be exhaustive. Question: If so, actual activity perfuming to form seeds is also included in direct causes; why is it not subsumed here? Is this also not fully logical?