Prabhupāda: That is allowed. That is stated in the Bhagavad-gītā, tad viddhi praṇipātena paripraśnena (BG 4.34), paripraśnena sevayā.Paripraṣna, argument, is allowed, but not with a challenging spirit. With a spirit to rightly understand. Praṇipātena paripraśnena. That... Argument is not denied. But so far Vedic statements are there, they are infallible, infallible, and the followers of the Vedas, they accept in that way. For example, just like cow dung.