C5 BCE. See generally OCD(3) s.v. (by K.J. Dover) bibliographically updated in OCD(4). This Suda entry = Epicharmus testimonium #1 Kassel-Austin.
[1] See phi 609.
[2] Or Lykophron (Kaibel). But see Lyco 14 White.
[3] According to Diogenes Laertius 8.78, Epicharmos himself recorded that he arrived in Sicilian Megara from Kos when only three months old, and went from there to Syracuse.
[4] Little-known names, though for Myllos (sic) see Kassel-Austin, PCG 7.28.
[5] Not a plausible thing to claim about a writer whose dialect was Sicilian Doric! Other versions have him inventing two of the consonants (theta and chi, pi and psi).
[6] Probably the so-called auxanomenos logos. To quote Pickard-Cambridge (below) 250-251, 'Epicharmus, we are told, used, and in fact invented, the auxanomenos logos.- the "fallacy of the sorites" of later logicians, so called from the use of a heap of corn (soros) as the favourite illustration of it. (How many grains of corn must be taken away before a heap of corn will cease to be a heap? What if that number less one be taken away? And so on -- cf. omicron 973.) Epicharmus applied it to personality. How much change will make a man a different person? And he appears to have argued that a debtor who borrowed money yesterday does not owe it today, since he is already a different man from the borrower; and that the man whom you invited yesterday to dinner may be turned away when he arrives today, "for he is another".'