T. Because, my name you never knew.
C. Have we never known or heard of you?
T. You may have heard that which I would not acknowledge, because it might be unjust.
C. Then what is your mission? Are you a teacher?
T. I teach what I know.
C. Do you not teach, sometimes, what you do not know.
T. I have done so; but now I do so no more.
C. Then your teaching must be very limited.
T. It is limited; and whose is not?
C. They who teach what they do not know?