The same was true with word analogies, pairs of words in which you were supposed to find some sort of logical, semantic relationship -- for example, "Sunset is to nightfall as is to ." And here you would be presented with a list of four possible pairs, one of which showed the same kind of relationship: red is to stoplight, bus is to arrival, chills is to fever, yawn is to boring: Well, I could never think that way. I knew what the tests were asking, but I could not block out of my mind the images already created by the first pair, "sunset is to nightfall"--and I would see a burst of colors against a darkening sky, the moon rising, the lowering of a curtain of stars. And all the other pairs of words --red, bus, stoplight, boring--just threw up a mass of confusing images, making it impossible for me to sort out something as logical as saying: "A sunset precedes nightfall" is the same as "a chill precedes a fever." The only way I would have gotten that answer right would have been to imagine an associative situation, for example, my being disobedient and staying out past sunset, catching a chill at night, which turns into feverish pneumonia as punishment, which indeed did happen to me.
 I agree with Perspective Three that the true impact of intelligent machines in our lives is that they challenge us to re-think our preconceived notions of what people can do or become in the future. A final example of this is brain-computer interfaces, or BCIs. Humans are able to manipulate computers with their brains via electrodes that are either implanted in their brains or attached (temporarily) to their heads. With these intelligent machines, formerly paralyzed people who had no hope of communicating with others are able to transcend their physical limitations by concentrating to form words out of keyboards on the computer screens. In addition, BCIs have captured the interest of people from all different backgrounds and are being applied to non-scientific fields like music to create new, previously unimagined instruments that react to people's thoughts, adding a new dimension to an ancient art form. Truly, intelligent machines are providing the impetus not just for greater efficiency, but for greater accomplishments.