Placebos have bee shown to work in various situations. One of the latest that I read about was Placebo surgery were a knee surgeon only pretended to operate on the patient's knee, yet this produced similar recoveries as patients who had had conventional invasive surgery. This to me suggests that the mind can control the body not only its mental state but its physical state. So how come medical trials of a new drug for instance use placebos as a blind to compare the effectiveness of the drug under trial. Surely the patients, or volunteers taking the placebo would experience a similar success rate (or even higher) as the people on the trial drug. I'm a bit confused.