If you mean that Proto-Greek arose from the coalescence of
> several mutually unintelligible languages, i.e. that it's some kind
of
> linguistic hybrid, I don't think the dialectal facts warrant such a
> hypothesis.
>
> Piotr
Thanks for your answar, Piotr.
My post was formulated as a question, not in order to propagate any
firm opinion.
I actually wondered if the antique Greek language could have evolved
from a coalescence of several mutually unintelligible, but still still
closely related indo-european languages, and that the main dialectical
variations was a reminiscent of these original language borders.