Mathematicians -- Explained

A physicist, a chemist, and a mathematician are stuck on a desert island with several cans of food, but no can opener. They each try to think of a way to open the cans.

First, the physicist makes his suggestion. They would construct a small catapult out of the obligatory palm tree in order to throw the cans against some rocks. The cans would break open and they could eat the contents.

The chemist dislikes this suggestion and proffers his own: They should make a fire and put the cans over the fire. The contents of the cans would expand and the cans would break open.

Finally, they both look to the mathematician to see if he can think of a better suggestion. He thinks for a moment, then starts, "Let us assume that we have a can opener..."

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