A man drives up to a farmer who is herding his sheep and says “if I tell you how many sheep you have, can I have one of your sheep?” Intrigued, the farmer agrees. The man sits down, pulls out his laptop, does some calculations, makes some phone calls, takes some satellite photos and finally announces, “you have exactly 413 sheep.” The farmer is impressed, “that’s exactly right, you can have the sheep of your choice.” The man picks one of the animals and the farmer says “now can you do something for me? If I can tell you what you do for a living, will you give me back my sheep?” The man agrees and the farmer immediately replies, “you’re a consultant!” The man is amazed, “yes, how could you know that?” “Well”, says the farmer, “you came without being asked, you told me something I already know, and you don’t know anything about my business … Now give me back my dog.”