बुद्धिमान्नाहार्यबुद्धिर्दुर्बुद्धिरिति पुत्रविशेषाः ॥ कZ_०१.१७.४४ ॥
buddhimānnāhāryabuddhirdurbuddhiriti putraviśeṣāḥ
The distinctions among sons are these: the intelligent; the one whose intelligence cannot be led astray (not manipulable); and the foolish.
A decision-maker who is hard to influence through flattery, bribery, or planted counsel—critical for preventing capture by courtiers or foreign agents.