1. An English cartographer arrives in a Welsh village to measure a local hill but determines it is only 299m, short of the 305m required to be classified as a mountain. 2. The villagers do not want to accept this and plan to add the remaining 6m of height themselves through collective effort. 3. Working together, the whole community contributes materials and labor to build up the hill's height until it reaches 305.5m, solving both the mathematical and ethical problems.