The Compendium of Caraka 3.8.18_3

3.8.18_3

parīkṣamāṇastu khalu parāvarāntaramimān jalpakaguṇāñ śreyaskarān doṣavataśca parīkṣeta samyak; tadyathā---śrutaṃ vijñānaṃ dhāraṇaṃ pratibhānaṃ vacanaśaktiriti, etān guṇān śreyaskarānāhuḥ; imān punardoṣavataḥ, tadyathā---kopanatvamavaiśāradyaṃ bhīrutvamadhāraṇatvamanavahitatvamiti/

Now, examining the disparity between the superior and the inferior, one should properly examine these qualities of a debater that lead to excellence, as well as those that are defective. That is to say: learning, specialized knowledge, retention, presence of mind, and power of speech—these they declare to be the qualities that lead to excellence. These, on the other hand, are defective, namely: irritability, lack of clarity, timidity, lack of retention, and inattentiveness.