And if it is held that the effect comes to be from something else that also comes to be, then we face an infinite regress. If the cause is produced from the effect, it can never be established. Your inability to answer, the impossibility of establishing the causal sequence persuade the wise to stick to No-birth. The classic case of the seed and the sprout remains unproved - the unproven cannot be used as the means to prove something. Ignorance of the sequential ordering of cause and effect itself points to the absence of coming to be.
Nothing comes to be whether from itself or from another.
Nothing that exists ever comes to be, nothing that does not exist, nothing that both exists and does not exist. The cause cannot come to be from an unoriginate effect, nor does an effect simply happen of itself. The uncaused certainly does not come into existence. Knowledge must have an object, otherwise both will be non-existent. For this reason, as also from the experience of pain, our opponent's assertion of the existence of the object should be admitted.