唯識二十論述記 2.103

2.103

Commentary: If you admit they occupy the same location, then according to what you say, all phenomena of aggregated form would have the measure of a single paramāṇu and could not become coarse. Because they could not become coarse, the fault is as stated before. What was stated before? It means that if six [paramāṇus] occupy the same location, the measure of the aggregate should be like a single paramāṇu, and then aggregated form should also be invisible. The formal inference is as before, hence it is not repeated.