In a scene in an ancient Greek play, Knights, the character Demosthenes opens a writing tablet on which an oracle had written a prophecy, and while looking at the tablet, he continuously expresses his amazement at its contents. His companion presses him for information, whereupon Demosthenes explains what the oracle had written. Of the following claims, which one can most justifiably be rejected on the basis of the statements above? ['The character of Demosthenes in Knights is not based on a historical figure.', 'Only rarely in ancient Greece were prophecies written down on writing tablets.', 'In ancient Greece, people did not read silently to themselves.', 'In ancient Greek plays, the reading aloud of written texts commonly occurred as part of the on-stage action.']