In the newly discovered land there was a pier that reached out into the sea and disappeared over the horizon. We tried to imagine where such a pier might go. At first, our explorers walked out on it, but ran short of food and water after a few days with still no end in sight. They turned back. Then we developed a plan: one team walked out on the pier, carrying twice the amount of food and water they needed for a round trip. When they exhausted a quarter of their ration, they left half the … [Read more...]