Sun Tzu's seven rules for picking the best actions based upon the high priority of safety.
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This article explains that we must explore opportunities to identify how to advance our position. These explorations are experiments. We never know if they will work or not. To experiment safely, we must always consider the effect of our actions on our current position. The problem is that certain types of actions are incompatible with certain types of positions. We endanger our position when we take actions without considering their affect on our position.