IGNORANCE
A professor noted among his students for the caustic wit had in one of his classes, one year, a young man who was both ignorant and conceited. One morning he made a specially self-satisfied display of both these characteristics, and the professor said he would like to see him at the end of the hour.
When he came up after the lecture, the professor asked: "You are Mr. Junkins?"
"Yes, sir."
"Have you a visiting card?"
"I—I—yes, sir," stammered the puzzled student.
"Then, Mr. Junkins," the professor said dryly, "write down on your visiting card all that you know, and bring it to me tomorrow."