Centuries ago, during the witch trials of the medieval era, a unique way of determining who was or wasn’t a witch was created. A woman suspected of being a witch would have her right thumb bound to the big toe on her left foot. She would then have a rope tied around her waist, and be thrown into a nearby pond or river.
She was viewed as a witch if she floated, as her body had “rejected baptism” in the water. She would then be put to death for her supposed crimes. If she sunk in the water — drowning in the process — she was deemed pure.
Either way, the woman ended up dead.