How to stop repetitions in rules in prolog

Posted by Pradeep on Stack Overflow See other posts from Stack Overflow or by Pradeep
Published on 2010-03-17T05:10:26Z Indexed on 2010/03/17 5:21 UTC
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marriedcouple(X,Y) :-
 parent((X,Z),bornin(_)),
 parent((Y,Z),bornin(_)),
 female(X),male(Y);
 male(X),female(Y),
 different(X,Y).

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