तत्त्रिषु चतुषु वा कृच्छ्रेणोपपद्यते ॥ कZ_०१.१५.३८ ॥
tattriṣu catuṣu vā kṛcchreṇopapadyate
That (effective counsel/decision) is attainable only with difficulty when conducted with three or four (persons).
As the number of participants increases, secrecy and coherence degrade; therefore even a small expansion beyond the minimum makes effective counsel harder to secure.