Brain expansion: different theories about rapid expansion (Evolution)

by David Turell @, Thursday, August 27, 2020, 15:15 (33 days ago) @ dhw

DAVID: Dawkins can't think.

Dawkins would say the same about someone who made such statements as “All brain expansions were designed by God who speciates all”, and “My beliefs are facts to me.” Both of you are perfectly capable of thinking, but I wish the two of you would be a little less presumptuous and acknowledge that your opinions are not facts and should not be stated as such.

dhw: ….nobody knows what caused the brain expansions, but my point – for the umpteenth time – is that since we do know the brain makes such changes as complexification, reshaping, shrinkage and minor expansions IN RESPONSE to new requirements, there is no reason to suppose that major expansions were not produced by the same mechanism. Bald statements that “all brain expansions were designed by God”, and “God steps in for all speciations” do not provide any reason for assuming that past brain changes were not produced in the same manner as present brain changes.

DAVID: We can only use what we know. All we see is brain shrinkage from the complexification process. Your expansion addition to the process is a hopeful extrapolation of pure supposition. I believe God speciates for the real reason that new designs are so complicated. Real theories should involve a range of related considerations, not a unipolar jump in judgement.

dhw: I don’t understand your refusal to acknowledge the above: that what we see is “complexification, reshaping, shrinkage and minor expansion IN RESPONSE to new requirements.” We have agreed that shrinkage is simply the result of cells becoming redundant owing to the enhanced efficiency of complexification. I agree with you completely that real theories should involve a range of related considerations. I have just given you the related considerations of how the brain works now, bearing in mind that pre-sapiens brains also involved complexification and different shapes. You ignore all these related considerations and make a “unipolar jump”: an unknown and eternal and all-powerful intelligence we call “God” must have done it.

My causes of my jump are listed in a book I wrote. The brain we are discussing is the most complex organ appearing out of an evolutionary process, and obviously had to be designed. Your narrow considerations do not tell a whole story. Consider the preponderance of evidence. I have, but you seem not to leave your narrow bias.


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