Teacher: So, to con­clude my lec­ture, I just want to tell you all again that this is il­le­gal.
Stu­dent: What’s il­le­gal?
Teacher: Have you been lis­ten­ing?
Stu­dent: No.

–Co­lum­bia Uni­ver­si­ty

Over­heard by: Stuck in Class