Sun Tzu's strategy is the science of experimentation. All strategy depends on the "rules of the ground," but unlike a game, strategy teaches that each new ground has its own rules. For example, what works on the new ground of the Internet isn't the same as what works on the new ground of nanotech. The principles of strategy are a set of metarules that allow us to discover the rules of any particular new ground quickly, cheaply, and safely. However, when good strategy allows you to discover the rules of the ground you are on, you must act on that knowledge.