nahyanyanirapekṣasya kadācid ajanakatvaṃ yuktam / nāpi yadyasmin satyapi na bhavati tat tanmātrakāraṇaṃ yuktam atiprasaṅgāt /
That which is independent of anything else can never fail to be productive [of its effect]; and when something does not occur even in the presence of another thing, the latter cannot be regarded as its sole cause, as [this would lead to] undesired consequences.