During a visit to a farm, a man saw the farmer feeding his pigs. The farmer would lift a pig up to an apple tree, and the pig would eat the apples off the tree. They moved from one tree to another until the pig was satisfied, then he would start again with another pig. The bemused man watched this for some time, then said, “This is the most inefficient method of feeding pigs that I can imagine. Just think of the time that would be saved if you shook the apples off the tree and let the pigs eat them from the ground!” The farmer replied, “But what’s time to a pig?”