Suppose there were an experience machine that would give you any experience you desired. Superduper neuropsychologists could stimulate your brain so that you would think and feel you were writing a great novel, or making a friend, or reading an interesting book. All the time you would be floating in a tank, with electrodes attached to your brain. Should you plug into this machine for life, preprogramming your life's experiences?... Of course, while in the tank, you won't know that you're there; you'll think it's all actually happening. . . . Would you plug in? What else can matter to us, other than how our lives feel from the inside?
3quarksdaily: The Experience Machine