A shepherd was herding his flocks in a remote pasture when suddenly a brand new Jeep Cherokee advanced towards him out of a dust cloud. The driver, a young man in a Brioni suit, Gucci shoes, Ray Ban sunglasses and a YSL tie, leans out of the window and asks: "If I can tell you exactly how many sheep you have in your flock, will you give me one?" 

The shepherd looks at the yuppie, then at his peacefully grazing flock and answers, "Sure!" The yuppie parks the car, whips out his notebook, connects it to a cell phone, surfs to a NASA page where he calls up a GPS navigation system, scans the area and opens a database and some 60 spreadsheets with complex formulas. Finally, he prints a 150-page report on a miniature printer, turns to our shepherd and says: "You have exactly 1586 sheep!" "That's correct. As agreed, you can take one of the sheep," says the shepherd. He watches the young man make a selection and bundle it into his Cherokee. 

As the car starts to pull away, he calls out: "If I can tell you exactly what your business is, will you give me my sheep back?" "Okay, why not?" answers the young man, stopping the car. "You are a consultant" says the shepherd. "That's correct," says the yuppie. "How did you guess?" 

"Easy," answers the shepherd. "You turn up here without being asked. You want to be paid for information I already have. And you don't know anything about my business because you just took my dog."