ABSTRACT
Early Greek and Chinese philosophers seem to agree on an axiom that now looks very curious to us, namely that ‘contradiction is impossible’, and with it also debating, refuting and lying.1 In the Euthydemus, an early Platonic dialogue, two sophists, Dionysodorus and Euthydemus, attempt to persuade their pupil Ctesippus of the validity of this paradox.
