A shepherd is herding his flock in a remote pasture when suddenly a
brand-new BMW roars towards him. The driver, a young man in a Hugo Boss suit, Gucci shoes, and Ray Bans, leans out and asks the shepherd, "If I tell you exactly how many sheep you have in your flock, will you give me one?". The shepherd looks at the city slicker, then at his field full of grazing sheep and calmly answers, "Sure."
The yuppie parks his car, whips out his notebook and connects it to a
cell phone, then surfs to the NASA website, where he calls up a GPS
satellite navigation system, scans the area, and then opens up a
database and an Excel spreadsheet with complex formulas. He sends an
email on his Blackberry and after a few minutes, receives a response.
Finally, he prints out a 150-page report on his hi-tech, miniaturized
printer, turns to the shepherd and says, "You have exactly 1586 sheep."
"That is correct; take one of the sheep." said the shepherd. He watches the young man select one of the animals and bundle it into his car.
Then the shepherd says: "If I can tell you exactly what your business
is, will you give me back my sheep?". "OK, why not?" answers the young
man. "Clearly, you are a management consultant" says the shepherd.
"That's correct" says the yuppie, "but how did you guess that?"
"No guessing required." answers the shepherd. "You turned up here
although nobody called you. You want to get paid for an answer I
already knew, to a question I never asked, and you don't know crap
about my business. Now give me back my dog."