When I was a boy, I came down with a case of foot warts: painful devilish things. A doctor gave me some corrosive stuff that was supposed to eat through them. I quickly applied it to a tooth that had fallen out--due to my abnormal curiosity--and was delighted to see it almost completely decay in two days. Unfortunately, my warts seemed quite resistant to it. When my Grandmother learned of my ailment, she handed me a potato. I was told to take it outside and bury it. Despite strongly suspecting my Grandmother's bizarre wart-remedy to be a lame ploy to get me out of her kitchen, I ended up doing as I was told. One does not get to do something as absurd as bury a potato every day, after all. To keep a short-story short, the potato remedy worked. Back then I considered the whole thing a coincidence. Maybe it was. Or, more likely, burying the potato worked as a placebo. Yes, placebos work against warts, despite there being no obvious reason why they should. I know because Radio Lab and Google told me so, and combined they are surely incapable of lies. So is there a legitimate place for placebos in modern medicine? Maybe doctors asking patients to bury potatoes is going too far, but it is common for them to prescribe sugar pills that they tell their patients are real medicine. On one hand, this sort of cure is no better than that of witch doctors, and requires the doctor to lie. On the other hand, it works.