<< I was simply doing top-down postulating (that is, from the present
backwards) about a hypothetical RNA world.  I'd certainly agree with you if
you are wanting to push the envelope of speculation back even earlier;
there's nothing new or far-fetched about your arguments.

 >>

Fair enough.

I think most take temp for granted. Yet I think
it is so important to remember that you can't
produce amino acids, and other monomers from
chemistry within the sun or at absolute zero.

Thus the chemistry for making the ingredients
has some very non random boundaries.
Also the environment that the earth had was
a cyclical one - and that too was mostly non random

And finally for any chem system to adapt to the environment, that environment
would have to be somewhat  predictable and stable 
(but with slight variation)
or no system could either survive, or adapt to it.

For instance an environment that had 100 years
of growing hotter with 5 scattered days of
below zero cold, then followed by 20 years
of no heat - etc. There is no chemical system
that could be born in this mess.

We take our cyclical and very stable environment
for granted and play up its dramatic aspects 
too much - great for art, not for first life
scenarios.
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