substitute for peripeteia
Solution 1:
Actually the definition you offer more closely matches Aristotle’s term anagnōrisis (ἀναγνώρισις), recognition, notably the recognition of the truth by the tragic hero: definition in Liddell-Scott-Jones lexicon here; usage in Aristotle’s Poetics 1452a here, where Fyfe translates anagnōrisis as “discovery” and peripeteia as “reversal.”