An old man visits a doctor to seek remedy for the terrible pain in his leg. The doctor replies saying, “I am sorry but this could be due to your old age.” He further explains why nothing can be done to help with the pain.
The old man gets angry and questions the doctor about his ability and expertise. This angers the doctor, who asks the old man, “How can you say that I know nothing and I am at fault for the pain in your leg?”
The old man innocently replies, “It is quite obvious you are wrong. My other leg is of the same age too, but has no pain at all!”