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On 2013-01-12 22:36, BPJ wrote:
> That's a good point. Much what I have believed for a long time
> without setting it in the larger context.  I'm also inclined to
> believe it all predated toolmaking, and it was most of all a
> cognitive change.

Dang.  Forgot to write the last sentence:

... namely the ability to 'think symbolically' and
  distinguish between symbol and symbolized.  The rest
is culture and invention.

/bpj