JESS: Qst abt an application.

[Archana Raghavendra]

Hi all,         i am new to jess and am having problems with this.I create a .clp file which is like this.   (deffacts list (parents-of bob john mary) (parents-of sue john mary) (siblings hansel gretel) )   (defrule  find-siblings (parents-of ?x ?a ?b) (parents-of ?y ?a ?b) => (printout t ?x ?y))   (reset) (run)   when i run this, I get 4 combinations, bob and bob bob and sue sue and sue sue and bob   whereas I only want one. bob and sue OR sue and bob.   Archana