"While subduing consciousness is the most urgent aspect of Tononi’s work, he is especially animated when discussing consciousness in its fullest, brightest state. In his office in Madison, he described a hypothetical device called a “qualiascope” that could visualize consciousness the same way telescopes visualize light waves, or thermal goggles visualize heat. The more integrated the information—that is, the more conscious the brain—the brighter the qualiascope would glow. Using the device in an operating room, you would watch a patient’s consciousness fade to a dull pulse. If he woke up mid-operation, you might see a flicker."