Reason provides greater survival advantage than stimulus response, as proven by human adaptability. How reason came about is a different question. Human intelligence is one of the least well understood aspects of life, with no scientific or philosophical consensus on major issues like consciousness, free will and epistemology.
But none of it is relevant to theology. Consider this, if you were provided with a coherent and convincing theory of human reason based in the matter of the brain would you stop believing in God?
Define reason.
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“But none of it is relevant to theology. Consider this, if you were provided with a coherent and convincing theory of human reason based in the matter of the brain would you stop believing in God?”
No. But that is not the issue here.
Reason provides greater survival advantage than stimulus response, as proven by human adaptability.
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Circular argument.
“Humans adapted to their environment using reason, adaptation is why they survived, humans have the capability of reason, therefore they adapted to their environment using reason, adaptation is why they survived, humans have the capability of reason, therefore they adapted to their environment using reason, adaptation is why they survived, humans have the capability of reason, therefore...”
If all of the human behavior we see today is due to evolution, then a belief in the supernatural, particularly theism, is overwhelmingly valuable because of its ubiquitousness. If a behavior is detrimental to an organism and/or species, then it doesn’t continue in a majority of the organisms of a species.