成唯識論述記 9.279

9.279

述曰：遍知名寬，故七十四說：三性皆應遍知。《顯揚》六說：遍計所執唯應遍知，無餘義故，別得總名。餘二性皆遍知，由彼別可應斷、應證，如次得名。

The Commentary states: Because full understanding is broad in meaning, Fascicle 74 states that all three natures should be fully understood. Fascicle 6 of the Prakaraṇāryavācā states: The imagined nature should only be fully understood; having no other meaning, it uniquely receives the general name. The other two natures are both fully understood, yet because they can specifically be abandoned or realized, they receive their names respectively.