Charak Samhita
इमांमतिंबहुविधहेतुसंश्रयांविजज्ञिवान्परमतवादसूदनीम्। नसज्जतेपरवचनावमर्दनैर्नशक्यतेपरवचनैश्चमर्दितुम् ॥१५६॥
one who has acquired this knowledge based on various reasons and refuting the opponent’s view in debates does not get fastened by the pressure of opponents arguments nor does he get subdued by their arguments.
english translation
imAMmatiMbahuvidhahetusaMzrayAMvijajJivAnparamatavAdasUdanIm। nasajjateparavacanAvamardanairnazakyateparavacanaizcamarditum ॥156॥
hk transliteration by Sanscript