成唯識論述記 1.206

1.206

述曰：此即第一，敘三類計，正破彼執。此中有二：初敘三計；二、別破三。外道雖多計執各異，種類而說莫過三種。

The Commentary states: This is the first part, recounting three kinds of assertions to directly refute their attachments. Within this there are two: first, recounting the three assertions; second, individually refuting the three. Although non-Buddhists are many and their posited attachments differ from each other, when speaking of their types, they do not exceed three kinds.