puruṣārthaḥ abhyudayaniḥśreyasalakṣaṇaḥ, tasyābhidhāyakam, natu kākadantaparīkṣāvad apuruṣārthaphalam
"Beneficial for human beings" means expressing that which is characterized by prosperity and the highest good, not something fruitless like examining crow's teeth.