Chapter 7



Get your facts first, then you can distort them as you please.

Mark Twain


Engineers have a saying: “You can only control what you can measure.” When a scientist or engineer performs a small-scale experiment in his own laboratory, he can calibrate all of his instruments, make his own measurements, check and cross-check his measurements with different instruments, compare his results with the results from other laboratories, and repeat his measurements until he is satisfied that the results are accurate and valid. When ...

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