 Proving, or demonstrating to an interrogator, that one is justified is another matter, and not necessary for simply being justified. Socrates, some might argue, shows only that the craftsmen, poets, and politicians cannot defend themselves from his questions. He does not show, one might argue, that the poets, politicians, and craftsmen have unjustified beliefs.  Since we gain very little insight into the details of the conversation in this dialogue, it would be unfair to dismiss this interpretation on these grounds. Perhaps Socrates did show, through his intense questioning, that the craftsmen, poets, and politicians formed and held their beliefs without adequate evidence or formed and held them through unreliable belief forming processes.  Socrates only reports that they did not know all that they professed to know.  Since we do not get to witness the actual questioning as we do in Plato's other dialogues, we should not reject (EA2) as an interpretation of Socrates' view of wisdom in The Apology. 