Big brain evolution: brain size and intelligence (Evolution)

by David Turell , Monday, March 26, 2018, 18:25 (2432 days ago) @ dhw

DAVID: Your complaint about my theory has a problem. You assume the s/s/c is one monolithic unchanging form, the same in life and in death or when the brain is non-functional for a period (NDE) I look at the evidence and make the conclusion that the s/s/c has two different forms and/or mechanisms to explain the way the s/s/c seems to function in two different realities, life and death. In life it must work with the brain to produce new thought or resurrect memory. The brain alone without the s/s/c cannot produce thought, but by the same token, in life the s/s/c cannot produce thought without the brain. I don't know why this is not clear to you. I've stated this before: the dualism I see has more than one dualism: brain soul duality, and soul in life and soul in death dual forms. In death the s/s/c has a way of supplying its own hardware by some sort of quantum mechanics, perhaps transferred from the brain as death occurs.

dhw: I have already agreed that a brainless self will function differently from a self with a brain, and material life must be different from immaterial life. But that is not what we are discussing! You claim that your God had to expand the pre-sapiens brain before it was able to come up with new thoughts. Our discussion therefore concerns the relationship between s/s/c and brain during life, not possible differences between soul in life and soul in death. NDEs are only relevant insofar as they appear to provide evidence for dualism – namely, that the mind and body are separate entities. IF they are (please note the block capitals), the immaterial mind does the thinking and the material body/brain provides information and implements the thoughts. Information: “Me hungry, me see living meat, me often get hurt when get too close.” New thought: “Maybe make sharp weapon to throw from distance.” Makes sharp weapon, which requires new skills and therefore causes new changes to brain (pre-sapiens: probable complexification plus major expansion; whereas sapiens: complexification, limited minor expansion, but also shrinkage as some cells/connections no longer required). Concept first, brain change as a consequence. This dualistic hypothesis contradicts the materialistic hypothesis that the material brain is responsible for thought, and conforms to modern scientific research on how we change our brains (illiterates, taxi-drivers, musicians). As a dualist, why do you object?

Your cute caveman dialogue befits your ability as an author of plays and Children's books but in no way offers an explanation of how pre-sapiens brains suddenly grew by 200 cc with each jump in the fossils. The only evidence we have is advanced artifacts related to larger fossil brains, indicating a larger brain has better conceptualization, nothing more. Since methods of operation in evolution uses previously developed operations, the only thing we can assume is that brain plasticity existed in the pre-sapiens and their brains responded like ours does so there is plasticity and specific brain area growth, but no change in brain/skull size. All we show is shrinkage since we arrived on the scene. I'll stick with God creating the growth.