The nuclear industry has based much of its analysis on what I believe is demonstrably flawed thinking. I would classify numbers from the nuclear industry in three types. Some are predictably spot-on. Some are predictably off, with the true value turning out to be greater by a factor of two or more. And some are predictably, and sometimes demonstrably, off by at least an order of magnitude. Which number falls into which category seems to depend entirely on what it is to be used for.