Poetics (16.10-17.2)

There is also a kind of fictitious discovery which depends on a false inference on the part of the audience, for instance in Odysseus the False Messenger, he said he would recognize the bow, which as a matter of fact he had not seen, but to assume that he really would reveal himself by this means is a false inference.[*]

Best of all is the discovery which is brought about directly by the incidents, the surprise being produced by means of what is likely—take the scene in Sophocles’ Oedipus or in the Iphigeneia—for it is likely enough that she should want to send a letter. These are the only discovery scenes which dispense with artificial tokens, like necklaces.[*]

In constructing plots and completing the effect by the help of dialogue the poet should, as far as possible, keep the scene before his eyes. Only thus by getting the picture as clear as if he were present at the actual event, will he find what is fitting and detect contradictions.

The censure upon Carcinos is evidence of this. Amphiaraos was was made to rise from a temple. The poet did not visualize the scene and therefore this escaped his notice, but on the stage it was a failure since the audience objected.[*]