same view is repeatedly found elsewhere in Plato's early writings on Socrates. In other statements, though, he implies or even claims that he does have knowledge. For example, in Plato's Apology Socrates says: "...but that to do injustice and disobey my superior, god or man, this I know to be evil and base..." (Apology, 29b6–7). In his debate with Callicles, he says: "...I know well that if you will agree with me on those things which my soul believes, those things will be the very truth..." Whether Socrates genuinely thought he lacked knowledge or merely feigned a belief in his own ignorance remains a matter of debate. A common interpretation is that he was indeed feigning modesty. According to Norman Gulley, Socrates did this to entice his interlocutors to speak with him. On the other hand, Terence Irwin claims that Socrates's words should be taken literally. Gregory Vlastos argues that there is enough evidence to refute both claims. On his view, for Socrates, there are two separate meanings of "knowledge": Knowledge-C and Knowledge-E (C stands for "certain", and E stands for elenchus, i.e. the Socratic method). Knowledge-C is something unquestionable whereas Knowledge-E is the knowledge derived from Socrates's elenchus. Thus, Socrates speaks the truth when he says he knows-C something, and he is also truthful when saying he knows-E, for example that it is evil for someone to disobey his superiors, as he claims in Apology. Not all scholars have agreed with this semantic dualism. James H. Lesher has argued that Socrates claimed in various dialogues that one word is linked to one meaning (i.e. in Hippias Major, Meno, and Laches). Lesher suggests that although Socrates claimed that he had no knowledge about the nature of virtues, he thought that in some cases, people can know some ethical propositions. Socratic irony There is a widespread assumption that Socrates was an ironist, mostly based on the depiction of Socrates by Plato and Aristotle. Socrates's irony is so subtle and slightly humorous that it often leaves the reader wondering if Socrates is making an intentional pun. Plato's Euthyphro is filled with Socratic irony. The story begins when Socrates is meeting with Euthyphro, a man who has accused his own father of murder. When Socrates first hears the details of the story, he comments, "It is not, I think, any random person who could do this [prosecute one's father] correctly, but surely one