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Good_standard( francesco)




reasonable Restaurant);- ft

not expensiveC Restaurant}. i - ! ?- 9ood_etaadard(X), reasonable £ X).

, , Prolog X = francesco

, , ?- reasonable (X), good_atandard (). Prolog

II:

, . , reasonable (X} , . : not Goal , Goal not Goal. , .

, , . Prolog ?- expensive! X).

: " X, expensive { X) ? , X?" X . Prolog , X = jeanluis.

?- not expensive (X).

: " X, not expensive (X!?" , X = francesco. Prolog "", . nor. expensive1! X) : not i X, , expensive ())

: X expensive (XJ

134 I. Prolog


, , not. , . . , , , Prolog, .

.
, -, , -,
.

, Prolog ( ), , , .

, :

, 1, 2

; not Goal Goal.

, true fail; , .

, , , . .

not . not .





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