Professor Hands Papers Back Ungraded, Claims He Used Invisible Ink

          English 279 got a surprise today when their papers were handed back in 2 weeks instead of the usual 5, but got a shock when the papers were void of any comments, corrections or grade. After a few minutes of silence while the professor continued his lesson, one brave junior asked the professor why the papers were ungraded. Professor Dambusta replied that he had written everything in invisble ink, and they all must figure out how to read it for themselves. So far, none of the students have managed to find the alleged comments.