成唯識論了義燈 2.149

2.149

此亦不爾，定障除現不斷於種，此依種故。答：雖依種立，不即取種，依種假立，言不斷所知者，據種體說；言斷異生姓者，據假功能，假實既殊，故不相反。若依此解，不定二乘但亦名聖，以異生性得聖捨故。一云不斷，望自乘說名得聖性，所知未斷彼姓猶存。

This is also not the case: concentration obstructions eliminate active manifestation without severing the seeds, whereas this is based on seeds. Answer: Although it is established on the basis of seeds, it does not immediately take the seeds [themselves]; it is conventionally established on the basis of seeds. The statement that they do not sever [the obstruction to] knowables is spoken in terms of the substantial entity of the seeds; the statement that they sever the ordinary nature is spoken in terms of the conventional function. Since the conventional and the real differ, there is no contradiction. According to this explanation, the indeterminate two vehicles are merely also called noble, because upon attaining nobility the ordinary nature is abandoned. Another [explanation] says it is not severed: relative to their own vehicle they are said to attain the noble nature, but because [the obstruction to] knowables is not severed, that nature still remains.