Nyāya Sūtras 44.4

44.4

yathoktopapanna iti, pramāṇatarkasādhanopālambhaḥ siddhāntāviruddhaḥ pañcāvayavopapannaḥ pakṣapratipakṣaparigrahaḥ/ chalajātinigrahasthānasādhanopālambha iti, chalajātinigrahasthānaiḥ sādhanam upālambhaś cāsmin kriyata iti evaṃviśeṣaṇo jalpaḥ/

'Endowed with the aforementioned [characteristics]' means: having proof and refutation by means of valid cognition and hypothetical reasoning, not contrary to established tenets, endowed with the five components of an inference, and maintaining a thesis and a counter-thesis. 'In which proof and refutation are carried out by means of quibbles, futile rejoinders, and points of defeat' means: disputation is qualified in this manner, that proof and refutation in it are carried out by quibbles, futile rejoinders, and points of defeat.