Pre-PIE as a PIE substrate?

[Robert Orr]

Perhaps Georgiev's Pelasgian (in his 1981. An Introduction to the History of
the Indo-European Languages. Sofia:   Bulgarian Academy of Sciences.) or
Holzer's Temematisch (in his 1989. Entlehnungen aus einer bisher unbekannten
indogermanischen Sprache im Urslavischen und Urbaltischen. Vienna: Verlag
der Vsterreichischen Akademie der Wissenschaften.) might provide some
pointers to the question posed below.

Robert Orr

>Putting aside for the moment the question of how much Kurgan actually ever
>came to most of Europe, the quote above suggests that if there is a substrate
>to look for in early European IE languages -- as described above -- it might
>consist of "pre-proto" IE languages.

>My question is: what would such a substrate be like?  What would one look for?
>Thinking of other examples of where IE has folded over on itself, so to speak
>-- where one IE language exhibits a substrate of an earlier IE language --
>where would one look for such a "pre-proto" substrate in PIE?  How would one
>separate "pre-proto" features from "proto" features, since both would
>ultimately be of the same origin?

>Regards, Steve Long