The Compendium of Caraka 3.8.57_3

3.8.57_3

varṇyasamo nāmāhetuḥ-yo heturvarṇyāviśiṣṭaḥ; yathā---kaścidbrūyāt---asparśatvādbuddhiranityā śabdaviditi; atra varṇyaḥ śabdo buddhirapi varṇyā, tadubhayavarṇyāviśiṣṭatvādvarṇyasamo 'apyahetuḥ//

The non-reason named 'equal to the subject to be proved' is a reason that is no different from the subject to be proved. For instance, someone might say: 'Intellect is non-eternal because it is intangible, like sound.' Here, sound is yet to be proved, and intellect is also yet to be proved; because it is no different from both being subjects to be proved, it is a non-reason that is 'equal to the subject to be proved'.