> there _are_ devices that can detect conditions that 5% of the population has _and_ have far fewer false positives - X-rays, CT scans, MRI. Perhaps, but you c

> there _are_ devices that can detect conditions that 5% of the population has _and_ have far fewer false positives - X-rays, CT scans, MRI. Perhaps, but you can't wear one on your wrist and you generally have to be quite sure something is wrong first.