Tricky, tricky bar question coming. Are you smart enough to answer it? A Tennessee driver is charged with a DUI after taking prescription medication as directed. What matters most? A, whether the medication was legally prescribed. B, whether the driver actually felt impaired. C, whether the medication caused actual impairment. Or D, whether a doctor prescribed it. This is really not a very tricky question if you're a Dr. Judge follower. The answer should be glaring at you.