The Compendium of Caraka 3.8.57_2

3.8.57_2

saṃśayasamo nāmāheturya eva saṃśayahetuḥ sa eva saṃśayacchedahetuḥ; yathā---ayamāyurvedaikadeśamāha, kiṃnvayaṃ cikitsakaḥ syānna veti saṃśaye paro brūyāt---yasmādayamāyurvedaikadeśamāha tasmāccikitsako 'ayamiti, na ca saṃśayacchedahetuṃ viśeṣayati, eṣa cāhetuḥ; na hi ya eva saṃśayahetuḥ, sa eva saṃśayacchedaheturbhavati/

The non-reason named 'equal to the doubt' is that where the very reason for the doubt is [adduced as] the reason for removing the doubt. For instance: 'This man speaks on a part of Āyurveda; could he be a physician or not?' In such doubt, the opponent might say: 'Because he speaks on a part of Āyurveda, therefore he is a physician.' But he does not specify a reason that removes the doubt; and this is a non-reason; for that which is the reason for the doubt cannot be the reason that removes the doubt.