There was a dog show to determine the world's smartest dog. Three dogs made it to the final: one belonging to a doctor, one to an engineer, and one to a lawyer.
For the final challenge, each dog was given a bag of bones to see what it could create.
The doctor commanded, "Stethoscope, go!" His dog built a detailed human skeleton. The judges were so impressed they were ready to award the trophy immediately but decided to let the others try.
The engineer then said, "Slide-rule, go!" His dog constructed a complex suspension bridge. The judges were beside themselves, unsure which dog to pick.
Finally, the lawyer said, "Loop-hole, go!" His dog promptly ate the bones, secured a percentage of all the tolls from the bridge, and outmaneuvered the other two dogs.