तैर्मन्त्रयमाणो हि मन्त्रसिद्धिं गुप्तिं च लभते इति ॥ कZ_०१.१५.३१ ॥
tair mantrayamāṇo hi mantrasiddhiṃ guptiṃ ca labhate iti
因为与他们商议,他既能获得谋议的成功(有效的决断),也能获得保密——据说如此。
Mantrasiddhi (effective counsel leading to success) and gupti (secrecy).
That this is a cited opinion/position in the debate, which Kautilya may accept or reject next.