One of my students asked me, after I'd shown them, on the screen that pulls down in front of the white board, an image of a painting by the painter Paul Cézanne, why I thought the artist had given this painting the title he'd given it, rather than some other title, to which I’d replied that I did not know, though after I’d admitted as much I’d begun to speculate as to what the answer might be, and in fact had become so carried away by the question, and what my thoughts were with regard to it, that I spent the remaining minutes of class on that subject, without arriving at a conclusion, so that after the hour was over, and my students had gotten up from their seats and had gathered their things and had left, I was still looking at the image of the painting, where it had been projected onto the wall, trying to articulate something about it to myself.