Big brain evolution: brain size and intelligence (Evolution)

by David Turell @, Wednesday, April 18, 2018, 20:42 (244 days ago) @ dhw

DAVID: Of course the materialism of the issue is shown by what happens in the brain.[/i]

dhw: It is not clear to me whether your final sentence is or is not an acknowledgement of the materialistic/dualistic dichotomy I keep pointing out in the scientific research and in your own insistence that, despite your professed dualism, the s/s/c can only THINK by using the brain except when it hasn’t got a brain to think with. Do you or do you not acknowledge this dichotomy in both contexts?

I can only repeat what I believe: in life the immaterial s/s/c cannot think without being attached to the material brain. When the brain is not functional the s/s/c changes its quantum mechanism slightly and exists in an afterlife. Your version of duality is certainly not mine.

DAVID: My pointing out the shrinkage is that the demonstrated shrinkage is opposite to your view that the desire for implementation of concepts forces a new sized brain to carry that out. What we see is a brain that is able to complexify and shrink 150cc in size while developing complex concepts and carrying them out. I agree with you that it is new complexity

dhw: Shrinkage is in sapiens, and I keep offering you an explanation for it. My hypothesis of concepts forcing expansion refers to pre-sapiens. Once more, here is my hypothesis step by step:
Pre-sapiens: small brain, new concepts force expansion of brain and skull to implement them.
Sapiens: brain and skull have reached maximum size for comfort. New concepts force complexification and limited expansion of certain areas within given skull size. Efficiency of complexification causes overall shrinkage.

The only evidence we have about brain activity (shrinkage) is in sapiens but it might just as well apply to all pre-sapiens, since evolution builds on mechanisms of its past.


dhw: Please explain in equally direct terms what you object to, and please explain what you think is the cause of shrinkage.

DAVID: Agreed Lucy couldn't think like we do. But remember, 20,000 years ago no one could think like we do, but 150cc smaller brain and the s/s/c have vastly more complex thinking.

dhw: Yes, we know the modern s/s/c thinks vastly more complex thoughts. I have explained that thought evolves, as generations build on the thoughts of previous generations. Are you now saying that shrinkage has CAUSED the new thoughts?

No, brain complexification caused the shrinkage as demonstrated.

DAVID: The word 'grounded' confuses you? As built on a solid basis of connectivity. They must work together as you full well know I believe. In life the s/s/c must use the brain to create thought. We go back and forth like a ping pong game.

dhw: I have explained the ambiguity of "grounded". Yes, the thinking mechanism must work together with the implementing mechanism in life, in order to give material expression/form to its thoughts. So do you believe that in life you have an immaterial thinking soul (software) which interacts with the material brain (hardware) by using it to gather information and to implement its thoughts? A simple yes or no may end this set of ping pong and we can start the next.

Of course, yes. As I have always explained your view of dualism is not mine.


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