This is not true. There are many natural processes known to encode information without the use of external intelligence. Tree rings encode information about local environmental conditions in ring widths. Spectral lines in starlight encode information about the elements in the star. In the same way arrangements of base pairs in genomes encode information about the local environment the creature lives. The only codes requiring intelligence are ones where arbitrary symbols are used as agreed upon abstractions to pass messages between a sender and receiver. Examples are Morse code and computer code. DNA does not meet such criteria. There is no intelligence-requiring abstraction in the DNA → amino acid process anywhere. There is no sender, no receiver, no message passed. Life is an extremely complex but entirely natural self-sustaining chemical reaction.
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