evidence: Socrates does talk a lot about slander, but he is usually worried about how slander prejudices audiences against speakers before a debate even happens (he says this in the Apology). In this case, the concern is the opposite of that in the spurious quotation: the quotation fears that debate devolves into name-calling and away from fact whereas Socrates is actually worried that previous name-calling and unquestioned assumptions makes it impossible for his audiences to apprehend the facts of a case.