|Nature, philosophy: nature is usually defined as the part of reality that was not made or designed by humans. No properties can be attributed to nature. E.g. since contradiction is ultimately a language problem, one can say that nature cannot be contradictory. Not all forms of necessity can be attributed to nature, e.g. non-logical necessity and unnecessary existence. See also de re, de dicto, necessity de re, existence.|
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There is obviously a deep gap between the brain, that brings forth consciousness and other organs that do not. How can clusters of cells produce mind?
Nature/McGinn: in order to save our assumption of the unity of nature, we must a) deny that the brain produces consciousness, or b) accept new non-physical properties.
Die Grenzen vernünftigen Fragens Stuttgart 1996
Wie kommt der Geist in die Materie? München 2001