When talking to children with Asperger’s syndrome about their special interest, the listener can be amazed at the depth of knowledge but also the ability of the children to understand or develop their own classification or cataloguing system for the interest. However, this is in stark contrast to their immaturity in the natural cataloguing system of people based on descriptions of character or personality. The child or adult with Asperger’s syndrome may be able to categorize objects and facts according to a logical framework but have considerable difficulty developing a framework for people.