“Let a cannon-bullet pass through a room, and in its way take with it any limb or fleshy part of man.” This dramatic scenario was envisaged by the great Enlightenment thinker John Locke in 1689. The bullet, he reasoned, “must touch one part of the flesh first, and another after, and so in succession.” But the action would happen so instantaneously that no one would be able to “perceive any succession, either in the pain or sound of so swift a stroke.”  Read More >>