I agree, that sounds like a good explanation.WeepingElf wrote:
Holzer formulates six sound changes characteristic of Temematic; most notably the PIE voiceless stops merging into the voiced stops, and the PIE breathy-voiced stops becoming (plain) voiceless stops. (The language is named for theses changes: tenuis > media, media aspirata > tenuis.) These changes look a bit weird: one would expect a neutralization of a voicing oppositio in stops to result in voiceless stops, not voiced ones, and the shift from breathy-voiced to plain voiceless doesn't really look as if it could happen in one move. However, I have found a different solution: 1. The feature [+voice] is neutralized, resulting in the voiced (unaspirated) stops merging into the voiceless stops, and the breathy-voiced stops becoming (voiceless) aspirated stops. 2. The resulting unaspirated/aspirated system then shifts to a voiced/voiceless one.
Still, though, could it just be that Balto-Slavic simply lacked a distinction that Temematic had, and didnt pick it up during loanwords? e.g. maybe the Tememian system was b/p/pʰ, with only a single change from PIE, but the proto-Balto-Slavic people heard /p/ as ⁅b⁆ the way English speakers loaned "goomba" from southern Italian cumpari and prefer to romanize Chinese cities iwth names like "Beijing" even though both stops are voiceless. This is because in English, voiceless stops are aspirated ... strongly at the beginning of a word, but still somewhat in the middle of a word. (voice onset time)
In fact, now that I think of it, if we hypothesize that Greek plain voiceless stops were similarly heard as voiced stops by speakers of Balto-Slavic, maybe Temematic is actually Greek itself, or a closely related macro-Hellenic language that died out.