 The Liar Paradox was well known to antiquity. Its discovery is often credited to Eubulides the Megarian (4th century BCE), on the basis of a remark by Diogenes Laertius (Lives of the Philosophers II.108), although in fact Diogenes says only that Eubulides discussed the paradox, not that he discovered  it.[2]  A little later, the poet and grammarian Philetus (or Philitas) of Cos (c. 330–c. 270 BCE), if we are to believe the story in Athenaeus of Naucratis’s Deipnosophists IX.401e, worried so much over the Liar that he wasted away and died of insomnia, as, according to Athenaeus, his epitaph recorded: