Kant vs Nietzsche

Naturally brains are made for survival, and culture is embedded in nature. So first of all there is a natural reason why a brain exists. The cultural reason merely follows. It is a followup reason, thus not the natural reaosn as the original reason. So cultural phenomenons like philosophy and scince are not the primary reason why a brain exists. In other words: Our brains were not primarily but merely secondarily made for philosophy or science or other cultural phenomenons, and philosophy or science or other cultural phenomenons are no organs of our body but merely cultural phenomenons.

Kant was right in almost all aspects (except some ethical aspects): his cosmological hypotheis, his theory about the emergence of the solar system, his theory about life, his theory about human beings, his anthropology and other philosophical or scientifical theories are true.

For example: In order to know what is behind or beyond nature we need philosophy, especially metaphysics, but philosophy and its metaphysics are embedded in human culture which is embedded in nature. So this is a dilemma of human knowledge (cognition and so on) and simultaneously the reason why humans are not capable of knowing everything.