Nyayasutra 1.6.1

1.6.1

apratiṣedhārthakaṃṣaṇārthaścakāraḥ ! ihaivaṃ jātivādī praṣṭavyaḥ, kiṃ bhavān vāstavoṃ pakṣasapakṣaliṅgānāṃ sthitimāsthāya evaṃ pratyavatiṣṭhate, vyāvahārikoṃ kāmapi, na cet kimanena | svecchāprasūtakalpanāmātrasulabhatayā[']nādeyatvāt | siddhena cātideśādvarṇyasiddhasyeti nyāyāt | kutaścit siddha eva dṛṣṭānto'siddhañca sādhyamiti tayoḥ sthitiḥ | evaṃ sati dṛṣṭānte'pyasiddhārthatvādīnāmaṅgatvamicchato vyāghātaḥ | teṣāṃ yathoktasthitivirodhitvāt | na ca yadyat siddhivirodhe [dhi] tadeva tasyāṃ liṅgamiti sambhavati | tathā ca yasmin sati yanna bhavatyeva tatsiddhau tadaṅgamiti bruvataḥ kathaṃ na vyāghātaḥ | evaṃ sādhyasthitivirodhyeva siddhārthatvādi tadaṅgamiti bruvato'pi | sūtrārthastu sādhyātideśābhyupagamādṛṣṭāntasyopapattirabhyupagamo yataḥ, tato na pratiṣedhaḥ | yadvā dṛṣṭāntasyopapatteḥ sādhyasādhanavattvādināsiddheḥ, pakṣe sādhyasyātideśo jñāpanaṃ yato'taḥ pratiṣedho na yukta ityarthaḥ | tathā ca siddhasya varṇyatvāpādane, asiddhasya vāvarṇyatvāpādane, asiddhasya bhāvatvāpādane mānāntarasiddhasya tatprayogasādhyatvāpādane ca vyāghātaḥ |