I think this says it all.

[davywavy]

A physicist, a chemist and an economist are stranded on an island, with nothing to eat. A can of soup washes ashore. The physicist says, “Lets smash the can open with a rock.” The chemist says, “Let’s build a fire and heat the can first.” The economist says, “Lets assume that we have a can-opener…”

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[zenicurean.livejournal.com]

One day, a CIA guy, a KGB guy, and a Mossad guy decide to see which one of their offices is the most effective at catching enemies. They talk it out a bit, and decide on a very simple goal: Go into the woods and catch a rabbit. The CIA guy says, "Well, that's easy, I can do that in a month." And so, the CIA sends all its gear into the forest. It wiretaps trees, interrogates little fuzzy critters, pays off squirrel informants, that sort of thing. After a full month of intense surveillance and camera work they come out and report that, as far as they can tell, rabbits don't exist.

The Mossad guy says "That's silly. I can do this in a week." The Mossad crew goes in, plans for a day, and then spends another six burning down most of the forest and killing everything that moves. After a full week they come out of the smoldering wasteland and explain that they're sure there was a rabbit in there somewhere and that they almost certainly got it. The KGB guy has been observing all this with a distinct air of contempt. "You're all ineffective," he says. "My people are experts, they can do this in ten minutes!" He gives a signal, and two KGB agents walk into the forest. And sure enough, in ten minutes they come back, dragging a beaten and bloodied bear that's shouting "For the love of God, no more! I confess, I'm a rabbit, I'm a rabbit!"

[davywavy.livejournal.com]

It's funny because it's true.