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13 lines
258 B
Prolog
13 lines
258 B
Prolog
-/* Prolog test file */
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-male(john).
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-male(peter).
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-
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-female(vick).
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-female(christie).
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-
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-parents(john, peter, christie).
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-parents(vick, peter, christie).
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-
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-/* X is a brother of Y */
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-brother(X, Y) :- male(X), parents(X, F, M), parents(Y, F, M).
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