On the border of Kentucky and Tennessee there's a small forest. Half of the forest belongs to a Kentucky farmer, while the other half belongs to a Tennessee man. One day, while out for a walk in the woods, the Tennessee man comes across a wolf caught in a trap. He rushes back to his house and calls his Kentucky neighbor. There's one of your wolves caught in a trap on my side of the forest. How do you know it's one of *our* wolves? the Kentucky farmer asked. Well, the Tennessee man replied, he's already chewed off three of his legs and he's still trapped.