Some forms of Greek before the Koine Greek period are reconstructed as having aspirated stops. The Classical Attic dialect of Ancient Greek had a three-way distinction in stops like Eastern Armenian: /t tʰ d/. These stops were called ψιλά, δασέα, μέσα "thin, thick, middle" by Koine Greek grammarians.
Is there an answer to this question (If it cannot be answered, say "unanswerable"): Who referred to the Classical Attic dialect stops by the three distinctions?
Greek grammarians