Last week, I completed a short course in gas chromatography. Completing the course reminded me of what Stephen Covey used to say: “To know and not to do is really not to know.” He is so right. It’s one thing to know the law of blood and urine testing. It’s a very different thing to know the science of blood and urine testing. To know the science, you have to do the science, and lawyers typically do not have the opportunity to do the science. Now, however, lawyers get to do the science of gas chromatography in a short course presented by the American Chemical Society.