Re: ev. of intelligence/tools etc

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These are an interesting set of hypotheses developed by Rob Quinlan. Some
of the problems I see are that not all possibilities are covered. For
example, in Hypothesis1, it could be possible to have something else
driving intelligence, such as more complex sociality, yet a new tool
industry might precede the new hominid form without being under natural
selection, or because the new tool industry might be linked to changes in
social behavior not from intelligence directly. Another question revolves
about taphonomy, where many finds simply do not include a happy
conjunction of homs, tools, evidence for a shift in subsistence, i.e.,
the river carries the hom parts downstream, but not the tools. These are
probably minor quibbles, perhaps not. In any event, I think Rob has given
us something valuable to build on.
R. Holloway

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