I'm not alone on the list am I? Hello?

I've been scouring Bomhard's book like mad lately. He has six vowels
reconstructed, three pairs of allophones. He reconstructs for Indo-European:

PN > PIE
i > i, e
@ > e, a, @
u > u, o
e > e
a > a, o, @
o > o

The front and back vowels I expected. But notice that the central pair (@ ~ a)
can correspond to the ablaut pair e ~ o in IE (if not a which occurs with
laryngeals, or @). By the way, Afro-Asiatic merged the high vowels with @ and
the low vowels with a, so a @ ~ a ablaut pair may exist for AA.

So I'm asking if the stress shifts that produce IE ablaut didn't come from an
earlier source found in IE, AA, and possible Kartvelian. And should I have
posted this on [tied] instead?

~DaW~


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