Erases an object from the object base.
A a KnowledgeWorks object.
must be bound to a KnowledgeWorks CLOS object or a KnowledgeWorks structure.
The given object is removed from the object base of the current inferencing state.
(erase ?x) ; ?x bound to an object
KnowledgeWorks and Prolog User Guide (Macintosh version) - 6 Dec 2011