>the mediopassive: "It could also be
> used, though probably rarely, as a true passive", p. 466.
There is some doubt as to whether a true passive is possible in PIE, simply
because there is no consistently at all amongst the IE languages about
passive formation. Some of them have sometimes used the middle, but all
have developed other methods independently.
It is argued that if passive usage was inherited, this pattern would not
have developed.
Peter