An engineer, a physicist and a mathematician are staying at a hotel. A fire breaks out in the night, the engineer wakes up, dumps water on it putting it out and goes back to bed.
A while later, the fire rekindles. This time the physicist wakes up, calculates precisely how much water is needed to put the fire out, dumps that amount of water on the fire putting it out, and goes back to bed.
A while after that, the fire rekindles yet again. The mathematician wakes up, determines there is a solution to the problem, and then goes back to bed.
A while later, the fire rekindles. This time the physicist wakes up, calculates precisely how much water is needed to put the fire out, dumps that amount of water on the fire putting it out, and goes back to bed.
A while after that, the fire rekindles yet again. The mathematician wakes up, determines there is a solution to the problem, and then goes back to bed.