26.43 Consider a deductive data base with the following rules: (20 points)
r1Â : ANCESTOR(X, Y) :- FATHER(X, Y)
r2: ANCESTOR(X, Y) :- FATHER(X, Z), ANCESTOR(Z, Y)
Notice that FATHER(X, Y) means that Y is the father of X; ANCESTOR(X, Y) means that Y is the ancestor of X.
Notice that FATHER(X, Y) means that X is the father of Y; ANCESTOR(X, Y) means that X is the ancestor of Y.
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Consider the following fact base:
FATHER(Harry, Issac), FATHER(Issac, John), FATHER(John, Kurt)
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Posted 27 Jul 2017 09:07 AM
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