“An engineer, a physicist, and a mathematician, are sleeping in a hotel...

The hotel catches on fire, so the engineer goes to the bathroom, fills up a couple buckets of water, and puts out the fire in his room then happily go back to sleep. The physicist calculates the center of the fire, measures out a teaspoon of water, and throws it in the center, putting out the fire and then happily goes to sleep. The mathematician wakes up, defines that there is a way to put out the fire, then happily goes to sleep.”