syād etad yadi nāmāsmābhiḥ siddhāntabalād upakalpiteyam ihamatis tathāpyasyā bhavadbhir nibandhanaṃ vaktavyam ity āha svecchetyādi /
[Someone] might say this: "Even if this notion has been assumed by us based on the strength of [our] established doctrine, still you must explain its basis." Thus [the author] speaks beginning with "svecchā."