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It is because the reader Umaśvāti refers to his father as "Kau Bhashani," indicating that his father belongs to the "Kau Bhiṣaṇ" gotra, while "Swāti" is mentioned in the context of "Hārita" in the Pattāvalī, which is recorded as a disciple of Śyāmācārya. Furthermore, the eulogistic passage clearly states that the author of Tattvāārtha, Umaśvāti, is mentioned in the lineage of readers; however, in the Pattāvalī, there are no specific terms related to the lineage of readers associated with Śyāmācārya or his guru, Swāti. Thus, the mentioned eulogy dismisses the erroneous interpretations that circulate in the Digambara and Śvetāmbara traditions. On the other hand, it provides a brief yet accurate account of the author's history.
In the eulogy concerning the time of the reader Umaśvāti, there is no reference to any specific time, nor has any other means to ascertain the exact period been found so far. In this context, three aspects are utilized for contemplation: 1. Reference to the branch, 2. The time of older commentators in the Jūnā tradition, and 3. Comparison with other philosophical texts.
1. It is difficult to determine precisely when the "Kanāra Phalā" referred to in the eulogy emerged, yet it appears in the list of branches in the Kalpa Sūtra under the heading of "Vidyanāra branch."
1. "Harichayutta sachu, 2 Chandrimō Hārich, 2 Sāmi" – Nandi Sūtra, page 49.