>  >
>  Now, I've never seen anything specifically claiming that Sumerian was
>  a conlang, but this
> 
http://www.sumerian.org/prot-sum.htm
>
>  does seem to me to imply that the author thinks both Proto-Sumerian
>  and PIE were created by people who were previously without language.
>  You have to scroll down a bit to get to the strange parts.  I may be
>  misinterpreting this, of course.
>