Miracle Lecture

My plan for today's 2-hour Intro to Philosophy class was to spend the first of two parts on Hume's argument against the possibility of having more reason to believe that a miracle has occurred than to disbelieve it. About 15 minutes in I realized that the room was eraser-less. Fortunately, I had enough clean board to make it through to the mid-point coffee break. During break I went on an eraser hunt in nearby classrooms, and the included photograph shows what my search yielded.