Revisiting language and brain expansion (Evolution)

by David Turell @, Tuesday, February 04, 2020, 21:38 (151 days ago) @ dhw

DAVID: You are confusing two different events: 200 cc jumps in brain size before the new species uses them to full capacity and the completed modern brain which can enlarge small areas when necessary. Note the entry yesterday about brain complexity ( Sunday, February 02, 2020, 19:29)

dhw: There is no confusion. You are simply ignoring my explanation of the jumps, and refusing to answer my question about shrinkage.

I totally do not accept your explanation of the gaps. I've bolded my shrinkage answer above.

dhw: […] yes, evolution builds from the past. The human brain built on the brain of its primate predecessors. That is precisely the process I have described. Limited capacity because we'd have had trouble with an elephant-sized head, and so complexification took over, as explained above (including shrinkage).

DAVID: […] You are again erroneously comparing two very different processes, a small area of the current modern brain modifying to handle a new task, vs. 200 cc jumps in brain size in speciation. Again reverting to and apples and oranges argument.

dhw; I have explained the jumps as being the result of the same process: namely, that the cells of the brain RESPOND to new requirements and do not anticipate them. I also answered your question: “why a limited capacity now?” Any other questions to which you wish to ignore the answers?;-)

I view evolution as requiring a designer to supply new additions to organismal capabilities. I compare to our modern appliances and autos which keep evolving with new designed parts and abilities. Why don't you see that all living biological beings are simply biological machines operating a somewhat different way while alive and in reproduction. You cannot ask your auto to change to a more modern one with new abilities. You have go buy one which someone else's mind designed for you. I completely reject chance to do this and the recognized gaps in evolution cannot be explained by your thinking cells. There is evidence they have design capacity, only epigenetic minor modifications within the same species. My firm explanation for speciation is a designer. I accept nothing else.


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