[9급 지방직 영어 2025년 19번]

A hunter-gatherer in the Stone Age knew how to make her own clothes, how to start a fire, how to hunt rabbits and how to escape lions. We think we know far more today, but as individuals, we actually know far less. We rely on the expertise of others for almost all our needs. In one humbling experiment, people were asked to evaluate how well they understood the workings of an ordinary zipper. Most people confidently replied that they understood zippers very well―after all, they use them all the time. They were then asked to describe in as much detail as possible all the steps involved in the zipper’s operation. Most people had no idea. This is what Steven Sloman and Philip Fernbach have termed ‘the knowledge illusion’. We think we know a lot, even though individually we know very little, because we treat knowledge ___________________________ as if it were our own.