Consider the iatrogenics of newspapers. They need to fill their pages every day with a set of news items--particularly those news items also dealt with by other newspapers. But to do things right, they ought to learn to keep silent in the absence of news of significance. Newspapers should be of two-line length on some days, two hundred pages on others--in proportion with the intensity of the signal. But of course they want to make money and need to sell us junk food. And junk food is iatrogenic.