where does food come from?

     There are still people who insist that they have never eaten "a cow"--although they eat hamburgers. There are people who insist that they have never eaten anything that came from a farm--because that would be stupid and old-fashioned--or even pretend, as in Old MacDonald. I might have assumed that this was taught by ignorant parents, or that these people had never been to school, which is more common than anyone can imagine. Recently I began to suspect that perhaps some of the more outrageous notions of this kind are being taught in some school, somewhere. My suggestion is that we find out, and soon.