 We close this entry on the note that Sūtra-s were primarily composed in the seven centuries from 5th BCE to 2nd CE and, thereafter, for the next millennium and more, the philosophical work was carried forward by Sūtra commentators (tikākār-s) from respective schools. This latter period saw these epistemological debates rage among scholars from these schools. Note also that there is no consensus on the dates given here; most Western scholars accept these, while Indian schools place them further back in antiquity.