Gārgī’s second question targets the relationship between karma and jñāna: if liberation comes from acting with knowledge, then what is this knowledge? Tayor jñānaṃ vada prabho — tell me the knowledge of both. She is not asking for a separate exposition of jñāna but for understanding how the two work together. This is the question that opens the yogic teaching proper — the aṣṭāṅga exposition that follows.