Sun Tzu's five rules regarding our need to choose actions that test new positions for value.
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This article explains why it is always a mistake to think that, by spending more and more money, we can some how force an opportunity to produce the results that we want. Most of us realize that such an approach is simply throwing good money after bad. Only those expending other people's resources, i.e. those in government, can afford to continue programs the return little or no value to the investors.