caption: The image shows a drawing of a man and a woman standing next to each other, with the man holding a stick. At the bottom of the image, there is text that reads "Doctor Convex and Mr. Concave". The man is wearing a white lab coat and a stethoscope around his neck, while the woman is wearing an apron and a hat. Both of them have a serious expression on their faces, suggesting that they are discussing something important.