One in ten Americans takes an anti-depressant drug like Zoloft or Prozac. These drugs have been shown to work in some patients, but their design is based on a so-called “chemical imbalance” theory of depression that is incomplete, at best.
The not-quite human voice that emanates from your phone or GPS or other device is, more often than not, female. It's an obvious pattern, and one that many have claimed has a simple technical explanation: Female voices are easier to understand. The only problem is that it's not true.