KNOWING<br >AND<br >NOT<br >KNOWING<br >Nutrition is everyone s cup of tea--with a twi<br >"facts" everybody "knows" to be absolutely tJ<br >cisely those "facts" about which nutritionists<br >fill. On the other hand， some of the facts of<br >ti0nists are most sure are precisely those 1<br > )<br >generally don t accept. .+<br > For example， scientists are ~rtain that if y<<br >than you need， you gain weight， and if you e<br >lose weight. Yet the "calories don t count" n<<br >of the most persistent nonfacts I ve ever run<br >matter how often nutritionists hit it over the i<br >club， it gets up again like a cat with not ni<br >hundred lives.<br > By contrast， scientists are not at all certai<br >tic<br >irony:<br >e pre-<br >doubt-<br > nutri-<br >people<br >t more<br >s， you<br >is one<br >ss. No<br >with a<br >~t nine<br ><br >