Cervin uses only author-specific lexicons (Plato, Thucydides) from much earlier periods of Greek — not Koine Greek

Having rejected all NT lexicons, Cervin relies on lexicons for specific classical authors (Plato, Thucydides, etc.). These authors wrote in a different period of Greek (classical, not Koine). His sources are mostly from periods well before the NT — the closest is Diodorus (1st century BC). He has nothing from writers contemporary with Paul, like Philo. Greek changed over time; Koine Greek is not classical Greek. Wayne Grudem rightly asks why a lexicon on Plato or Thucydides should be given more credence than a specialty NT lexicon.