These chunks represent patterns (such as faces) as well as specific knowledge. For example, a world-class chess master is estimated to have mastered about 100,000 board positions. Shakespeare used 29,000 words but close to 100,000 meanings of those words. Development of expert systems in medicine indicate that humans can master about 100,000 concepts in a domain. If we estimate that this “professional” knowledge represents as little as 1 percent of the overall pattern and knowledge store of a human, we arrive at an estimate of 107 chunks.
