So your <a> is not central either?
I based my whole reconstruction on Anttila's idea of maximal contrast for
vowels in front-central-back positions.
Patrick
==========
in my proto-System,
*/a/ is neither closed like */i/
nor rounded like */o/.
Central does not make sense
here.
Arnaud
> =============
> It's a square system
>
> Rounded Unrounded
> Open o a
> Closed u i
>
> What's wrong ?
>
> Arnaud
>
> ===================
>
>