The firechief takes the mathematcian to the alley behind the fire department which contains a dumpster, a spicket, and a hose. Now I have to ask you just one more question. A biologist, a chemist, and a Physicist are taking a walk through the country when they come upon a cow. For some odd reason, none of them knew what it was. That's Bos Bovine.
Engineers think that equations approximate the real world.
Scientists think that the real world approximates equations. Mathematicians are unable to make the connection. An engineer, a physicist, and a mathematician are shown a pasture with a herd of sheep, and told to put them inside the smallest possible amount of fence. The engineer is first. The physicist is next.