Category of truthVastu (3) (object of valid organ of cognition) which is a fundamental principle of the summum bonum;
ultimate truths.
jīvājhmpuṇyapāpāsravasaṃvaranirjarābandhamokṣāstattvam...
tattvaṃ pāramārthikaṃ vastu.
(Jaisidī 2.1 Vṛ)
tattvamiti....tathyaṃ sadbhūtaṃ paramārtha ityartliaḥ......jīvādīnāmarthūnāṃ yā svasattā socyate.
(TaBhā 1.4 Vṛ)
See - Tathya.