These rascals, they conclude like that. Aparaspara-sambhūtam: "By combination of two or more material things produces another third or fourth thing." Aparaspara-sambhūtam, kim anyat kāma-haitukam (BG 16.8). They give example. This is the atheistic Sāṅkhya philosophy, atheistic Sāṅkhya philosophy: combination, permutation. But the example is given, kim anyat kāma-haitukam. Kāma. Just like a man and woman becomes lusty and their combination brings forth a child, a third matter. They think like that. They are thinking everything is matter. No. There is good brain within the combination. That is explained in the Vedic literature. Karmaṇā daiva-netreṇa jantur dehopapattaye (SB 3.31.1). This body is not coming accidentally by the sex intercourse. That is not the fact. The fact is karmaṇā daiva-netreṇa. Otherwise, why the same kind of body is not coming by material combination and permutation? Why there are different types of body? Why there is rich body? Why there is poor body? Why there is cat body? Why is dog body? Why there are varieties? That they cannot answer.
If you say that "Simply by combination of matter the secretion of the man and woman emulsify and takes another shape, and that secretion, discharge of matter, is due to lust," that is all right. But unless there is the living spark, soul, within that material combination, there is no pregnancy. The pregnancy will take place when there is actually living soul within this material creation, material combination, emulsification. That is the knowledge we get from Vedic sources. Karmaṇā daiva-netreṇa jantur deha upapatti (SB 3.31.1). Jantuḥ, the living entity, is getting a type of body by the karma. It is not simply lusty combination. Because the living entity has got his karma, therefore one is born as Mr. Ford, and one is born something else. It is due to karma. Otherwise, why he's born one rich and poor? There must be some consideration.