The world is not just complex but also dynamic and changing. Sometimes we try to solve a problem. But as soon as we have manage to do so, the problem turns out to have changed or a new problem turns up. Thereby it’s solution has become worthless. An interesting example is the construction of the bridge of Honduras. The bridge was built to withstand the worst hurricanes. Under hurricane Mitch the bridge proved to be of excellent quality. Unfortunately, after the flooding, the loop of the river had moved a few hundred meters. The bridge no longer crosses the river.