Nyayasutra 12.15

12.15

atyantasaṃśaya āpādyamānena saṃśayaḥ saṃśaya eva na syāt | kutaḥ, vaidhamryād vaidhamryadarśanāt | vaidharmyasya kāryyatvasya viśeṣasya mayā pradarśanādityarthaḥ | viśeṣaviśeṣadarśanasahakṛtaṃ samānadharmadarśanaṃ hi saṃśāyakam | taccātra nāstīti bhāvaḥ | nanu viśeṣadarśane'pi saṃśayo bhavatyeveti yadi brūyāt tatrāha—ubhayathā veti | ubhayathā samānadharmadarśane viśeṣadarśane'pi saṃśaye hyupagamyamāne'tyantasaṃśayaprasaṅgaḥ | yadā saṃśayo 'nuccheda eva syāt | ucchedakasyāpi viśeṣadarśanasya janakatvābhyupagamādityarthaḥ |
atrāpi dhāṣṭr‌ryādyadīṣṭāpattimeva kuryāttatrāha nityatvānabhyupagamācca sāmānyasyeti | samānadharmadarśanasya tvayāpi nityatvābhyupagamānnityasaṃśayakāraṇatvānabhyupagamādityarthaḥ | anyathā'nirṇāyakasādharmyāt prameyatvāt tavāpi nityatvasādhakatā saṃśaya eva syāt | ataḥ parapakṣapratiṣedhakataiva na syāditi bhāvaḥ |
sarvatra sādharmyādau viṣayeṇa viṣayijñānamatra lakṣyate nityatvena ca nityasaṃśayakāraṇatvam |