हेतोरादिः फलं येषामादिर्हेतुः फलस्य च ।
तथा जन्म भवेत्तेषां पुत्राज्जन्म पितुर्यथा ॥ १५hetorādiḥ phalaṃ yeṣāmādirhetuḥ phalasya ca |
tathā janma bhavetteṣāṃ putrājjanma pituryathā || 15 ||15. Those who maintain that the effect is the cause of the cause and the cause is the cause of the effect, describe, as a matter of fact, the evolution after the manner of the birth of the father from the son.
Shankara Bhashya (commentary)
How does the contention of the opponent imply a contradiction? It is thus replied:—The admission that the cause is produced from an effect, which is itself born of a cause, carries with it the contradiction which may be stated to be like the birth of the father from the son.