My friend Gilbert and some other truck drivers were to deliver loads of gravel out in the country. The directions they were given said to go down a certain road and, when they came to a cow tied to a fence post, to turn right.
While Gilbert was driving along slowly，he came upon a farmer leading a cow down the road. Assuming this was his landmark, he stopped and asked the man where his cow had been tied. After Gilbert explained why he wanted to know， the farmer took the cow back and tied it to the post. All the loads got delivered.