From: Michael Vassar (michaelvassar@hotmail.com)
Date: Thu Nov 03 2005 - 11:14:39 MST
It seems likely that genetic structure strongly biases the neocortex towards 
certain types of modality.  Cachalots have much more neocortex than we do, 
but don't do a lot of complex social organization.  Female Elephants have 
chimp-level encephalization quotients, complex social groups of size similar 
to those of hunter gatherers, fine manipulators, tool use, long lives, and 
human sized or larger neocortexes, but in the million years or so of their 
existance (20 million if Mastadons count) they have not developed any 
culture comparable to ours and specifically have not domesticated other 
animals or adapted to a range of climates to spread globally.  They are also 
ineffective in defending themselves against human hunter-gatherers.
http://www.elephantvoices.org/index.php?topic=why_comm&http://www.elephantvoices.org/why_comm/large_brained.html
http://faculty.washington.edu/chudler/facts.html
What is known of savants also suggests the presence of non-standard 
cognitive strong attractors.  Savants typically excell in one or a few of a 
standard set of skills.  Kim Peek appears to provide confirmation of the 
viability of high-speed textual input using the visual cortex.  I suspect 
that most people read faster than the effective bandwidth for auditory 
input, hence the important of suppressing subvocalization to maximizing 
reading speed.
http://www.wisconsinmedicalsociety.org/savant/kimpeek.cfm
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