Prabhupāda: Any phenomenon that has natural law, so that is the cause. And if we go on, so what is the cause of that natural law? Then ultimately we find Kṛṣṇa. Everything, janmādy asya yataḥ (SB 1.1.1), everything has got a cause, original source. So if you make actually research work what is the cause of this, what is the cause of this, that is called darśana. Darśana means seeing, finding out the cause. Therefore philosophy is called darśana-śāstra, to see the cause of the cause, cause of the cause, cause of the cause. So ultimately they have found Kṛṣṇa is the cause, original cause of everything.
Śyāmasundara: He is more interested, I think, in the immediate cause of something that is caused immediately by something else. Ultimately Kṛṣṇa is the cause, but what about the immediate cause?
Prabhupāda: Yes, immediate cause, we take, immediate cause. Immediate cause also we accept. So what is the conclusion? There is cause, immediate and remote. That we agree. But what is his proposition?
Śyāmasundara: His proposition is that we can study any instance of a phenomenon and find out the cause by applying these five methods: the method of agreement, then the second one is the method of difference. They're rather complicated.
Prabhupāda: That means five causes.
Śyāmasundara: No. Five methods of studying something to find out the cause. Five tests to find out the circumstances behind the phenomenon, the instance of the phenomenon, to find out the cause.
Prabhupāda: The final agreement.