Expert system that runs a set of given boolean-rules against the end-user. Asking him questions that must be answered with "yes" or "no" in order to get a final solution.
Custom editor used to create and maintain a set of rules for a given domain. - i.a. a database file with ".conan" extension.
File "troubles_mentaux.conan" is an effective example of a working set of rules used to help diagnose the end-user with a mental disorder.