Big brain evolution (Evolution)

by David Turell @, Wednesday, January 10, 2018, 15:23 (338 days ago) @ dhw

dhw: What we do not know is the spark that lit the fuse for this chain reaction. That, however, would be the only instance of “serendipity” – productive good luck, in contrast to the bad luck that has left 99% of species extinct. Variability within species is enough to explain why some groups of primates remained the same while others advanced. And there is no exclusion of the God theory, since this is a very late chapter in life’s history.

DAVID: I have read through this reasoning and still disagree. I'm convinced God wanted sapiens and took his time doing it through a delilberate process of evolution in which he proveided the advances. A smaller cortex cannot know what it cannot think of until its brain is larger and more complex.

dhw: Yet again, according to your dualism the cortex does NOT do the thinking, which is done by the s/s/c. But if it does do the thinking, it is still not the concept that depends on brain changes, but the IMPLEMENTATION of the concept: expansion for pre-sapiens, complexification for sapiens. The illiterate women’s brains changed through the effort to write. They did not change beforehand.

Covered elsewhere. The learning to read further compleixified a very complex cortex, and shrunk the brain. No enlargement seen.


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