Socrates steers the conversation back to the subject matter by asking who will recognize who speaks well or badly in arithmetic and in medicine. The answer is that the one who has the techne (craft / art) of arithmetic or medicine is the one who will recognize both types of speaker. Why does Socrates not mention a judge (kritēs) explicitly, or the verb "to judge" (dikazō)? He is certainly referring to the function of a judge, and we may ask why a judge is necessary for the argument. Why does Socrates not focus the argument on the arithmetician, the physician, or the rhapsode, directly?