The member-of relation tests whether an object is a member of a set.
member-of object set
The object argument is any object.
The set argument is a list of objects.
(ask (member-of 5 '(3 5 4))) ==> T
(tellm (:about Fred (wife Pam))
(:about Mary (:filled-by friends Joe Pam Sue)))
(ask (member-of (wife Fred) (friends Mary))) ==> T
Last modified: Jun 1 1995