A jewelry store was robbed one night and the police were interviewing the night watchman. When asked if he saw anything, the watchman said sure, that he and seen an elephant sneak in through a back door and it was the elephant that had taken all the missing jewelry. The interviewing Detective asked the watchman what kind of elephant it was. The watchman was stunned if not a bit irritated. "How should I know what kind of elephant it was?", he answered. The Detective responded that there are only two kinds of elephants, and that they can be identified by their ears. African elephants have large, broad ears while Indian elephants have much smaller ears, a difference that is readily observable. The detective went on to say, "So you can't ID the elephant even though there is such an obvious difference? Perhaps there was no elephant at all." Again the watchman looked a bit stunned, and of course, a bit irritated by the detective's accusing tone. Looking the Detective square in the eye the watchman retorted, "How in the world could I be expected to know what kind of ears the elephant had when he had a women's stocking pulled over his head?!"