HIPPIAS: To be sure, Socrates, I am the best.
SOCRATES: And therefore you would be the most able to tell the truth about these matters, would you not?
HIPPIAS: Yes, I should.
SOCRATES: And could you speak falsehoods about them equally well? I must beg, Hippias, that you will answer me with the same frankness and magnanimity which has hitherto characterized you. If a person were to ask you what is the sum of 3 multiplied by 700, would not you be the best and most consistent teller of a falsehood, having always the power of speaking falsely as you have of speaking truly, about these same matters, if you wanted to tell a falsehood, and not to answer truly? Would the ignorant man be better able to tell a falsehood in matters of calculation than you would be, if you chose? Might he not sometimes stumble upon the truth, when he wanted to tell a lie, because he did not know, whereas you who are the wise man, if you wanted to tell a lie would always and consistently lie?
HIPPIAS: Yes, there you are quite right.
SOCRATES: Does the false man tell lies about other things, but not about number, or when he is making a calculation?
HIPPIAS: To be sure; he would tell as many lies about number as about other things.
SOCRATES: Then may we further assume, Hippias, that there are men who are false about calculation and number?
HIPPIAS: Yes.
SOCRATES: Who can they be? For you have already admitted that he who is false must have the ability to be false: you said, as you will remember, that he who is unable to be false will not be false?