From the introduction:
The PCSIK Core Module defines the fundamental components of the PCSIK system. It details how characters are defined, without defining the characters for you. It explains the basic elements of game play, all the while allowing you to select which components of the system you want. It also includes a brief description of common genres, along with hints and suggestions of incorporating common themes into your games.
The Core Module does not contain any specific details beyond the examples. The actual content of the system is left to the group to define, as they need. Characters are created from the concept upwards, and theme overrides rules.