有时候一个看起来很难的问题，换个思路去想却很简单，一味地去钻牛角尖可能却对问题的解决没有任何帮助。

     在爱迪生发明灯泡的过程中,发现需要计算灯泡的容积,两个数学家为计算某种灯泡的容积，一夜没睡；怎么算也算不出来。秘书回忆说：“爱迪生一手接过灯泡，先用灯泡装满水，一手拿着量杯，将灯泡里的水往量杯里一倒(当然，量杯上有刻度)，爱迪生马上就得到了灯泡容积的准确数据，而两位数学家却干了整整一个通宵还没有结果。”

这件事情告诉我们发散思维的重要性，记住了：任何时候都不要在一棵树上吊死。

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