Technically, "because I didn't have observational data."Working with experimental data requires onlycalculating means and reading a table. Also, thismay be the most condescending comic stripabout statistics ever produced.The excellent Silbey at the Edge of the American West is stunned by the torrents of data that future historians will be able to deal with. He predicts that the petabytes of data being captured by government organizations such as the Air Force will be a major boon for historians of the future --(and I can't be the only person who says "Of the future!" in a sort of breathless...