Displays the names of all rules stored in the CLIPS environment.
Syntax
(list-defrules [<module-name>])
If <module-name> is unspecified, then the names of all defrules
in the current module are displayed. If <module-name> is
specified, then the names of all defrules in the specified module
are displayed. If <module-name> is the symbol *, then the
names of all defrules in all modules are displayed. This function
has no return value.