On 2006-07-19 18:46, Andrew Jarrette wrote:
> But why
> is the possibility of an independent IE aorist formation with
> thematic vowel and zero grade completely rejected?
Because the comparative evidence for such a formation has evaporated.
It's just possible (but by no means certain) that a few such forms were
recognised as aorists already in PIE, but there's little doubt that the
entire <ávidat> type is secondary. So is the <tudáti> type, its
counterpart among the present stems, though verbs of this type are
somewhat better attested. Perhaps some original root aorists tended to
be thematised as presents (punctual meanings are common among the
<tudáti> type).
Piotr