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SRCHBACK.PRO
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1986-09-25
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923b
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42 lines
/* Number of inferences = 2**(N+2) - 2 */
/* where N is largest number-word used. */
/* 32,766 inferences in this example. */
true1.
true2.
one(a):- true1.
one(b):- true2.
two(X) :- true1, one(X).
two(X) :- true2, one(X).
three(X) :- true1, two(X).
three(X) :- true2, two(X).
four(X) :- true1, three(X).
four(X) :- true2, three(X).
five(X) :- true1, four(X).
five(X) :- true2, four(X).
six(X) :- true1, five(X).
six(X) :- true2, five(X).
seven(X) :- true1, six(X).
seven(X) :- true2, six(X).
eight(X) :- true1, seven(X).
eight(X) :- true2, seven(X).
nine(X) :- true1, eight(X).
nine(X) :- true2, eight(X).
ten(X) :- true1, nine(X).
ten(X) :- true2, nine(X).
eleven(X) :- true1, ten(X).
eleven(X) :- true2, ten(X).
twelve(X) :- true1, eleven(X).
twelve(X) :- true2, eleven(X).
thirteen(X) :- true1, twelve(X).
thirteen(X) :- true2, twelve(X).
test :- thirteen(X),fail.