Prabhupāda: This experimental knowledge is always imperfect. Because they are experimenting with imperfect senses, therefore they must be imperfect. Our source of knowledge is different. We do not depend on experimental knowledge.
Śyāmasundara: Let us say that the remains of every animal, every living entity that has ever been found in the ground...
Prabhupāda: That is also a limited space. You cannot say you have excavated a portion of the earth and that is all. You cannot say.
Śyāmasundara: So far, anyway.
Prabhupāda: So far means that is not all. That is, so far, as soon as it is so far, that is not all.
Śyāmasundara: But, so surely we must be practical and say that every...
Prabhupāda: Practical means...
Karandhara: We can only operate on things that we have...
Prabhupāda: Practical means which is beyond your knowledge, beyond your capacity, that is impractical. So nothing is practical.
Śyāmasundara: How can I theorize there were other or higher forms...
Prabhupāda: You theorize partially, as far as. That is not perfect(?).
Śyāmasundara: If I accept your knowledge, how can I theorize that there were higher forms of life millions of years ago if I have never found any evidence and I have searched...
Prabhupāda: This is the evidence. This is the evidence. You have to see through the evidence, because there are, in the evolution there are so many species of life, say 8,400,000, they are all existing now. They are all existing now. Therefore why should I conclude that millions of years they did not exist?
Śyāmasundara: You say they are all existing now, but I don't see the dinosaur. There are no dinosaurs on this planet.
Prabhupāda: That is not the denied. Dinosaur you may not have seen, it may be existing some other... Neither I have seen the 8,400,000 different species of, different forms of life. But my source of knowledge is different. Your source of knowledge is different. You are experimenter with imperfect senses. I am taking from the perfect who has seen, who knows things. Therefore my knowledge is perfect. Just the same example: I am receiving knowledge from my mother, "Here is your father," and you are trying to search out where is your father. You don't go to the mother, but you are searching out. So therefore, however you may search, your knowledge always will be imperfect.