I thought there was more to it than that - e.g. classical descriptions of pronunciation, evidence from poetry, etc. (And the back-tracking from their modern descendants that you already mention.) Still, it seems fair enough to note that using reconstructed ancient pronunciations to reconstruct further ancient pronunciations seems likely to magnify errors.
we know how Greek and Latin are pronounced due to name transcriptions into each other and Hebrew
Date: 2005-01-04 01:41 pm (UTC)